Litter robot green with flashing red - Litter-Robot 3 Connect. Tagged as LR3 Connect but this is not the Wi-Fi enabled model. I have the Litter Robot 3 and I keep getting sequentially flashing red and blue lights. This combination isn't in the manual so I'm not sure what to do. The robot is away from walls and perfectly level. There is nothing under the robot.

 
If the Litter‐Robot does return Home with a solid blue light, there are no issues with the functionality of the unit at this time. After troubleshooting for blinking blue light, I replaced the dfi sensor. However, after the replacement, I am getting the blue yellow red sequential blinking.. Cvs sienna

Litter-Robot 4. I could see this being an amazing tool for someone busy who has a big house and space for this little monster. For Colby and me, though, it is not worth the hefty price tag. $699 ...These sensors detect when a cat has entered or exited the unit. If your unit has a flashing red light bar or the unit will not cycle, this indicates that the cat sensor has been triggered for more than 30 minutes. Successful: If your unit returned home and displays a blue light bar, you've been successful.Inspect the litter and waste drawer. Empty the waste drawer. It's best to empty the waste drawer if it's getting close to full. Check for excess litter inside the globe. Using more than 10 lbs of litter can trigger the cat sensor, causing false cat detects. Make sure the litter is at or below the raised fill line.Toll Free: 877-250-7729 www.Litter-Robot.com The Self-Cleaning Litter Box that Really Works! ... flashing blue light on the Control Panel. ... elapsed, the red light turns off and the yellow light turns on as a Clean cycle begins. Toll Free: 877-250-7729 www.Litter-Robot.com ...Litter Robot 3 yellow light blinking. ... Blue, Green, and Red! r/techsupport • Crash with green purple flicker. r/Nest • Help: Blinking Green and orange. See more posts like this in r/litterrobot. ...Came home to a stinky litter robot and this solid blue and flashing yellow light. It's done this a couple times since the firmware update. According to the light codes guide it means the robot or scale feet are unbalanced, but my robot is on hard vinyl floor, not touching a wall, and there's nothing underneath it.Step 1: Place cover of litter tray under litter tray. The cover is extra protection against leaks and will be used later for disposal. Step 2: Record Today's Date of litter tray installation and Tray Change Date on the waste trap label. Recommended Disposable Litter Tray Replacement: At least every 20−30 days for 1 cat 10−15 days for 2 cats.The Litter-Robot is equipped with weight sensors located in the base of the unit that are used to further detect and weigh the cat within the globe while in the Home position. If your unit has a blue light bar with partial yellow flashing or the unit will not cycle, this indicates that the scale has been triggered for more than 30 minutes.I have a litter robot 3 bought last year. It is now getting stuck in a cycle and is unusable. Symptoms are: A rotation cycle starts and dumps waste Then just before reversing direction the robot stops, the yellow light starts flashing and the globe moves a small amount further in the orginal rotation direction and stops A power off and restart …Litter-Robot 4. £749. Never scoop again. Litter-Robot 4 solves the litter tray problem with automatic, self-cleaning technology that quietly provides a fresh bed of litter after every use, and reduces odours and litter tracking. Join over 1 million Litter-Robot customers.Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks. ... I've had it sux months the power light is flashing red I took the hopper sissy cleared it and put it back same issue. if I'm in the wrong group I'm sorry Share Sort by: ... There are two lights that can blink red, the power light doesn't blink. ...I noticed the left side of the litter robot seems to be pressing in a bit. So I took it apart cleaned it and put it all back together. Now all it will do is flash the blue light! The drawer is empty, the bag is not in the way, and it will not cycle at all, even when unplugged and plugged back in. Troubleshooting said to wipe the sensor with a ...All with the red and yellow flashing lights. It would just start to cycle-stop than, flashing lights. Get 1/4 of the way into a cycle, flashing lights. Make it all the way to dump and start to head back to the ready position, flashing lights. Complete an entire cycle, instead of the blue ready light, flashing lights. I've had the Litter Robot 4 for less than a week. It was working perfectly until 2 days ago when I changed the waste tray. I'm not sure what happened exactly, but the unit is flashing green then red lights. I've researched what I can find on Reddit and the web, but non of the troubleshooting has resolved the issue. Watch this video to find out how to make lawn care easier and eco-friendly with a rechargeable robotic lawn mower and a propane powered string trimmer. Expert Advice On Improving Y...Yellow Light Flashing. Ensure your unit is at least one inch away from furniture, walls, or room corners. Ensure your cat did not enter Litter-Robot during the clean cycle. If your cat did enter, please press the reset button after use. Ensure the litter level doesn't exceed the raised fill line.Unsuccessful: If you are still seeing a green light bar with partial red flashing after resetting at the Home position, there's likely an issue with your Litter-Robot. Issue not resolved? To repair your Litter-Robot, you will need a laser board or a base .Easy fix for three solid green lights, and two flashing red, which is cat sensor fault. I just got off the phone with the litter robot experts. The three open circles at the top of the …Light flashing Red/Green continuously on X-T3. I used my phone to take a long exposure shot and after I was done I turned off the camera but now this light flashed Red/Green while off. It's been 10+ minutes of continuous blinking while it's in the off position. And if I go to turn the camera on it does nothing; the light just continues ...Litter-Robot is the leading self-cleaning litter box. Discover which model is right for you and your cat. Compare products. Feature. Litter-Robot 4. Litter-Robot 3 Connect. Litter-Robot 3. Show differences. As low as $699. Shop. As low as $549. Shop. $499. Shop. Colors. Size (footprint)To reset the Cat Sensor, press Reset when the unit is at the Home position and the control panel displays a solid blue light. Press the Reset button firmly and quickly, then watch for the blue light to flash to confirm you have successfully reset the Cat Sensor. On some units, the blue light will flash quickly (press Reset again if you think ...Litter-Robot by using some catnip or a favorite treat. 2. Add a scoop of litter from the old litter box to provide a familiar scent for your cat. 3. Place treats on the step or handle around the Litter-Robot so your cat associates rewards with the unit. 4. Once you notice that your cats have used the Litter-Robot, power the unit on to cycle the ...Common Solutions for Litter Robot 3 Blinking Yellow Light: 1. Empty the Waste Drawer: When the waste drawer reaches its limit, the Litter Robot typically alerts users with a blinking yellow light. Addressing this is straightforward: open the drawer, carefully remove the full waste bag, and replace it with a fresh one.The Litter Robot 3 is an incredibly popular automatic cat litter box which automatically detects when a cat has entered and exited, and rotates the main globe to sift and dump the used litter. It is subjected to conditions which most robots - if they had a choice, would prefer not to be subjected to. There's a lot of dust and debris which can cause issues, which leads to the robot not ...This is chapter 2 of the RobotShop Litter-Robot II repair guides. ... Now the yellow light turns to a flashing red. What should I do now? ... sherrifletcher January 23, 2018, 5:51pm 4. I bought one used when I plug it in green and yellow and red lights all blink nothing will make it stop. jmichaud January 24, 2018, 9:50am 5. Hi,Kurupt_Introvert. •. Flashing yellow to red means the motor has detected an obstruction or jam. Turn the unit off and remove the bonnet and globe. Check for gear or motor obstruction. Reassemble the unit and verify a proper litter level. Then turn the unit on—if the problem persists, try the Litter-Robot 3 Troubleshooter or contact Whisker ...Received my first litter robot 4 today (ordered May 25) - what the heck does red to green light flashing mean? Add a Comment. Sort by: Acgator03. • 2 yr. ago • Edited 2 yr. ago. …Litter-Robot 4: Red Light Bar Flashing (Cat Sensor Fault) Litter-Robot 4: Red Light Bar Momentary Flash (Control Panel Lockout Mode) Litter-Robot 4: Red Light Bar with Partial White Flashing (Globe Position) Litter-Robot 4: Red Ping-Pong Light Bar (Motion in Drawer)Ensure your Litter-Robot 4 is on hard ground (no carpet), and make sure the unit has all parts (bonnet, globe, and base). Fill your Litter-Robot to the fill line with litter and then perform a hard reset on your unit.Step 8: Connect it and test. Most of you are here because there are 3 flashing lights on your Litter-Robot's control panel. Sometimes this problem is caused by a faulty power supply or the motor itself. If even after checking the set screw on the motor and checking the voltage on the power supply with a multimeter, the lights….So woke up this morning with litter robot 4 offline. The big light is solid blue with the little light flashing blue. How do I reconnect it? I pressed the wifi button once, goes to solid light yellow, pressed it again and goes back to blinking blue. If I press the wifi for 3 seconds, goes to flashing yellow, but nothing happens on the app. blue and red flashing lights. I've had my Lr4 for 4 months and it's been perfect until last night, I went to change the litter and when it did the spin cycle it stopped over the waste bin hole and started flashing blue then red continuously and nothing I do will fix it. It occasionally turns to 3 green 2 red if I'm messing with the sensors but ... Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks. ... the interior lights of my Litter Robot 4 flashing on and off multiple times before going back to being steady on. I didn't notice anything preceding this happening and the status lights have been both all blue and all red at different times when this ...The most noticeable difference between green and red cabbage is the color of the leaves. Green cabbage leaves are broad and pale green in color, and red cabbage leaves are fan-like...Hello, If your Litter-Robot 4 is displaying 3 green solid and 2 red flashing lights, please follow these steps: Put the globe in the home position. Press the reset button. Keep the unit idle for at least 15 minutes in order to recalibrate the laser. 3.Further Troubleshooting: If the unit continues blinking blue, remove the waste drawer and press cycle. Press reset 2x to abort the cycle and return the unit to home (it will level the litter). If the unit goes to solid blue with the waste drawer removed, ensure there is nothing in the drawer blocking the lenses.RE: Litter Robot 3 Connect. I have the three lights flashing Blue, then yellow, then red (Flashing sequentially after having already replaced the base twice.I am physically unable to do the troubleshooting due to arthritis. I think the company has tried hard to avoid human interaction in their support methodology.Description: Robot starts with Blue light flashing and will not respond to any input. Hardware concerned:Litter Robot 3. Software concerned: Troubleshooting steps already taken: Cleaned / removed any rust from all contacts. DFI board has been coated to protect against corrosion (which worked for a while). Box cleaned and washed.Toll Free: 877-250-7729 www.Litter-Robot.com The Self-Cleaning Litter Box that Really Works! ... flashing blue light on the Control Panel. ... elapsed, the red light turns off and the yellow light turns on as a Clean cycle begins. Toll Free: 877-250-7729 www.Litter-Robot.com ...Reply. bitchassslutasswhore • 10 mo. ago. When I get the yellow flashing lights, I lift the globe, vacuum out the litter, reset it in the right position, then I unplug it from the back of the box. Before plugging it back in, I hold in the cycle button, plug in while holding the button in, release, and it works again. Might help you too.Once the update is complete, your Litter-Robot should be ready for use. Successful: If your unit returned home and displays a blue light bar, you've been successful. Unsuccessful: If you are still seeing a green light bar with partial red flashing after resetting at the Home position, there's likely an issue with your Litter-Robot.Litter-Robot by using some catnip or a favorite treat. 2. Add a scoop of litter from the old litter box to provide a familiar scent for your cat. 3. Place treats on the step or handle around the Litter-Robot so your cat associates rewards with the unit. 4. Once you notice that your cats have used the Litter-Robot, power the unit on to cycle the ...Now, let's run a test cycle. Short press the Reset button, then short press the Cycle button to run a Clean cycle. After Litter-Robot cycles, it should return to the Home position, displaying a blue light bar. Successful: If your unit displays a blue light bar, you've been successful. Unsuccessful: If you are still seeing a green light bar with ...Details. Say goodbye to scooping and give your cats clean litter every time they go with Litter-Robot 3, the highest-rated automatic litter box. Purchase includes a 90-day in-home trial, comprehensive coverage with our WhiskerCare™ 1-Year Warranty, and free shipping (excl. AK, HI, PR). Never scoop again®. Helps reduce litter box odors.Flashing red light, No connection. Hello, I'v been playing with my Grandboard Dash since months and suddenly it won't connect to my phone anymore. After power up it shows a red flashing light. I tried to update the app but it does the same. Also after changing to fresh batteries. Please help. It seems the GranBoards email support team also won ...Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks. Members Online • 56kul ... Chime at Red light to Green light? upvotes ... Litter robot three: unable to fix flashing yellow lightLight Bar- Green and Red Alternating If your Litter-Robot 4 light bar is alternating between Green and Red Flashing, this is most likely due to the placement of your unit. Ensure your Litter-Robot 4 is on hard ground (no carpet), and make sure the unit has all parts (bonnet, globe, and base).21K subscribers in the litterrobot community. Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks.Feb 27, 2024 · To unpause the unit, press the cycle button. To abort the clean cycle, press reset or empty. Press any button to put the unit on pause. On the other hand, a blinking yellow light signals a problem. The flashing sequence determines how to resolve the issue. These sensors detect when a cat has entered or exited the unit. If the unit detects an issue with all three laser sensors, called curtain sensors, it will indicate a fault with the entire system and the light bar on the Litter-Robot will display red and blue alternating lights. You will also receive a notification on your phone if you use the ...Litter-Robot 3 Connect is the highest-rated, WiFi-enabled, automatic, self-cleaning litter box for cats. ... so they may release more odour (pee smell). Suggestions are Worlds Best (corn) clumping litter (red pack) and also Applaws crushed walnut shell. ... If its still flashing, it will be dust. Please provide a photo of the lens, for review ...Litter-Robot 3: Yellow and red or blue and red flashing (Motor over torque) If Litter-Robot 3 globe becomes jammed or overloaded when rotating clockwise, the motor will stop and reverse for 5 seconds.25K subscribers in the litterrobot community. Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks.AudioVOX July 7, 2017, 8:46am 12. @Wahoo650 You can find parts for your Litter-Robot II on our website here. kristophersullivan November 27, 2017, 12:04am 13. Open up the motor. Be Careful it's tricky. Grab some gear oil and a few drops of white lithium grease. Quiet and smooth operation again.Submit support request. Select a category for your ticket. Select a sub-category for your ticket. Please describe your issue. Litter-Robot. Litter-Robot 4. Got questions or issues? Contact Litter-Robot Support today. We’re dedicated to ensuring a …Fix 3: Power on the unit. If the blinking blue light is caused by a power failure, simply plug the unit back in and wait for it to power on. In the event of a power failure, the Litter Robot will automatically enter standby mode and the blue light will blink. To power on the unit, simply plug it back into a working electrical outlet and wait ...21K subscribers in the litterrobot community. Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks.my litter robot ready button wouldnt stop blinking blue. In this video i clean the sensors.In this video we'll be taking a look at 5 different errors the Litter-Robot 4 may run into and how to fix them. This include LED status identification of the...View some of our most frequently asked questions about the Litter-Robot. Can’t find your answer? Contact us at whiskersupport.com. ... One of the lights will start flashing, indicating the current Wait Time Setting. ... 3 minutes = 1 green light displayed; 7 minutes = 2 green lights displayed; 15 minutes = 3 green lights displayed; 25 minutes ...1. When your cat exits Litter-Robot, a timer counts down, allowing the litter to clump before a clean cycle begins. 2. During the clean cycle, the globe slowly rotates. The patented sifting process separates the clumps from the clean litter. 3. The clumps are deposited into a sealed waste drawer below. 4.If they are fast flashing they're the pinch sensor, but there are other errors which can cause flashing yellow lights. Step 1 is making sure that it isn't touching anything, like the wall - if you've already taken the darn thing apart you probably already did that though. Step 2 is something we do regularly with our robot because this used to ...Litter-Robot 4: Red and green alternating light bar (Calibration issue) Litter-Robot comes equipped with a calibrated weight scale to accurately detect when your cat has entered the unit, as well as measure its weight. If the unit displays a red and green alternating light bar, the unit has lost its factory scale calibration values. In a desperate attempt to communicate with the LR4, I tried holding the power and connect button together. It made the light turn into 1 pink square, then 2 pink squares, and now it’s flashing pink and yellow while still being unresponsive. I can find no reference to this light code, other than a reddit comment from a litter robot ... Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks.Toll Free: 877-250-7729 www.Litter-Robot.com The Self-Cleaning Litter Box that Really Works! ... flashing blue light on the Control Panel. ... elapsed, the red light turns off and the yellow light turns on as a Clean cycle begins. Toll Free: 877-250-7729 www.Litter-Robot.com ...The rules below monitor the level of poop in the Litter Robot drawer, and change the color of the lightstrips from green to yellow to red as the drawer fills. When the level in the drawer becomes critical (the Drawer Full Indicator flag, tripped by an IR sensor above the drawer, becomes set), the under vanity lights start flashing.Litter-Robot 3 Connect. $549. Buy in monthly payments with Affirm on orders over $50. Learn more. Never scoop again and experience a new level of cleanliness with Litter-Robot 3 Connect, the top-rated self-cleaning litter box for cats. Since 2000, over 1 million happy pet parents have upgraded to Litter-Robot.Flashing red light, No connection. Hello, I'v been playing with my Grandboard Dash since months and suddenly it won't connect to my phone anymore. After power up it shows a red flashing light. I tried to update the app but it does the same. Also after changing to fresh batteries. Please help. It seems the GranBoards email support team also won ...If you've been troubleshooting issues with your Litter-Robot Open Air to no avail, try this Fresh Restart to eliminate confounding conditions and...Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks. ... LR4 half green bar half flashing red Litter-Robot 4 Hello, I got my litter robot a few months ago and have been experiencing issue that I have been able to resolve previously. Today mid cycle my LR4 starting doing a left to right dance with the green ...1. Empty the Drawer. On the Litter-Robot, you have a drawer that collects the cat litter. If it becomes full, the blue light will blink rapidly. But if you throw out the mess, the lights should go off. Before returning the drawer to its compartment, remember to place a new liner into the container.The Litter-Robot is equipped with an Anti-Pinch Safety Feature to make the Litter-Robot extra safe for your cat. While cycling, if a potential pinch conditi...This message isn't a message in your troubleshooter, nor is the green/red bar flashing light combo. Sad that your online support is lacking and I have to go to google to try to fix this. ... Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks. Members Online. Litter robot 4 fence upvotes r/logitech. r ...LR4- Flashing Green and White. Just got the unit yesterday and have been having multiple issues it is flashing green and white now. I checked the manual but their are no instructions for that light combination. here’s the list of all the light descriptions and causes. Looks like it’s due to a calibration issue.Watch on. The Litter-Robot 3 is equipped with a cat sensor that detects when a cat enters and exits the globe. If the cat sensor has been continuously activated for 30 minutes or more, either by a cat that won’t leave the globe or by too much weight in the unit, the timing light will flash red. You will also receive a notification on your ... Hello, I got my litter robot a few months ago and have been experiencing issue that I have been able to resolve previously. Today mid cycle my LR4 starting doing a left to right dance with the green light and then changed to half green half flashing red. What Do Flashing Sequences Mean? 1. Yellow to Red. 2. Blue to Yellow to Red. 3. Red to Yellow to Blue. 4. Blue, Yellow, and Red. What to Do When Your Litter-Robot 3 Lights Are Blinking? 1. Reset the Unit. 2. Contact Support. 3. Change Litter. 4. Check the Power Supply. 5. Check the Bonnet or Globe. Conclusion.When I turn on the Litter Robot 3 (non-connect), blue light is flashing, then I press Reset and fast yellow light is flashing. When I press Reset again, blue light is flashing and so on.. What I checked so far: - Anti Pinch Pins looks good and are touching each other. - DFI is clean and 4 IR LEDs are blinking once a second.View some of our most frequently asked questions about the Litter-Robot. Can’t find your answer? Contact us at whiskersupport.com. ... One of the lights will start flashing, indicating the current Wait Time Setting. ... 3 minutes = 1 green light displayed; 7 minutes = 2 green lights displayed; 15 minutes = 3 green lights displayed; 25 minutes ...Liftmaster flashing red and yellow lights. This indicates that the opener is in "force control" mode, which means that the opener is sensing resistance on the garage door and will not close it. This could be caused by an obstruction on the tracks, a damaged opener, or a malfunctioning safety sensor. Check the tracks and sensors for ...Litter-Robot by using some catnip or a favorite treat. 2. Add a scoop of litter from the old litter box to provide a familiar scent for your cat. 3. Place treats on the step or handle around the Litter-Robot so your cat associates rewards with the unit. 4. Once you notice that your cats have used the Litter-Robot, power the unit on to cycle the ...Got my Litter robot yesterday and have a similar issue. Brand new out of the box it flashes just like yours, but mine is solid blue then solid white. I have a ticket open, but it is going nowhere. Bizarrely enough even when it is flashing like it is, I can push the wifi connect button and add the robot in the whisker app on my phone.The yellow light has remained on (not flashing) and it does not respond to any activity anymore. We have taken apart all the pieces and made sure they are clean. We unplugged it for a few hours but as soon as it's turned on again, the yellow light reappears. It does not respond to the reset, empty or power button either.What do auroras look like? - Auroras can have green, red or blue light or a combination of these colors. Learn more about auroras and light. Advertisement As we mentioned, auroras ...Reply. bitchassslutasswhore • 10 mo. ago. When I get the yellow flashing lights, I lift the globe, vacuum out the litter, reset it in the right position, then I unplug it from the back of the box. Before plugging it back in, I hold in the cycle button, plug in while holding the button in, release, and it works again. Might help you too.

Mixing red and green results in a brown or gray color. The exact shade depends on the ratio of the original colors and the amount of pigment present. Brown and gray are tertiary co.... Azalea city chiropractic

litter robot green with flashing red

Preparation. Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. OmniSense™ also supports the SafeCat system which continuously analyzes four safety zones to ensure your cat is always safe. There are three curtain sensors located in the ...The Litter-Robot is equipped with an Anti-Pinch safety feature to make the Litter-Robot extra safe for your cat. While cycling, if a potential pinch condition is detected, the globe will stop and reverse direction for 2 seconds. The yellow light will begin flashing quickly, about four times per second. You will also receive a notification on ...Easy fix for three solid green lights, and two flashing red, which is cat sensor fault. I just got off the phone with the litter robot experts. The three open circles at the top of the …If the Litter‐Robot does return Home with a solid blue light, there are no issues with the functionality of the unit at this time. After troubleshooting for blinking blue light, I replaced the dfi sensor. However, …Make certain you have the DFI shields clean of any debris or smudging of debris. This will cause the slow flashing blue light. Next check your weight sensor connection, its located behind the waste drawer in the center back of the base unit, this being disconnected will cause the slow flashing red light on power up.All with the red and yellow flashing lights. It would just start to cycle-stop than, flashing lights. Get 1/4 of the way into a cycle, flashing lights. Make it all the way to dump and start to head back to the ready position, flashing lights. Complete an entire cycle, instead of the blue ready light, flashing lights.MAGS How To Videos - How To Fix a Red Flashing Light on a Litter-Robot 3In this video I will show you how I fixed the flashing red timing light on my Litter-...Visit for solutions if your Litter-Robot 4 has a red light bar with a partial white flashing globe. Get instant support and fixes today. The store will not work correctly in the case when cookies are disabled. ... Litter-Robot 4: Red light bar with partial white flashing (Globe position) IMPORTANT. Make sure your unit is plugged in.The Litter Robot Open Air III has a blinking blue light when the bottom drawer is full. This review shows what that looks like and how to fix it.Since I boug...Litter-Robot 3 is equipped with infrared emitters and sensors, called DFI sensors, located above the waste drawer that check if the drawer is full each time the globe returns to the Home position. Once a full waste drawer is detected, the unit will indicate it is full with a blue flashing light.Litter-Robot 3: Yellow and red or blue and red flashing (Motor over torque) If Litter-Robot 3 globe becomes jammed or overloaded when rotating clockwise, the motor will stop and reverse for 5 seconds.The Litter-Robot is equipped with weight sensors located in the base of the unit that are used to further detect and weigh the cat within the globe while in the Home position. If your unit has a blue light bar with partial yellow flashing or the unit will not cycle, this indicates that the scale has been triggered for more than 30 minutes.Help! Had power outage for like sub-second, and nbn never managed to reconnect after that. Did reboot, reset, etc. nothing worked. The power light keeps flashing, then becomes solid for like 30 seconds, then again flashing, and again… optical got no light at all (no red no green no nothing)..

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