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Repair and disassembly information for the Logitech MX Master 3 wireless mouse. Released in 2019 and identified by model numbers MR0077, 910-005692, 910-005620, or 910-005647.

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Why it’s continuously blinking in red

Hi my mice started to blink continuously in red I tried to charge it and I tested individually without the battery, so it’s no the battery, it’s look like a permanent dead or is having a short circuit

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Hi Antonio!. Did you find a solution? I have the same issue. Please let me know if you find a fix


Unfortunately no , even in instructables or Reddit I haven't had luck, maybe if I upload more images of each piece separately some one can help us


@antoniocardenas @nahuelpala58349 pictures will definitely help. I would have a look at the USB C port also. especially if the behavior is the same whether it's plugged in or not


I encounter the same problem too. I checked the battery, and it is fine. I don't know what's going on.


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Logitech MX Master 3 Flashing Red Light Fix

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It could be:
1) dead battery/batteries
2) driver not installed
3) usb dongle wasn't recognize properly due to glitch
4) drive for dongle wasn't installed correctly or corrupted for usb port its in
5) dongle radio burnt out
6) mouse radio burnt out
7) you forgot to put usb dongle in usb port.

Try fresh batteries
Try plugging the dongle in another usb port
Try unistalling then reinstalling the driver
Try going in device manager, see if there are unloaded drivers and either remove devices then refresh list; or update drivers.

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Hi and thanks for your reply the battery is a rechargeable one and is fine I tested with a multimeter , about the dongle and signal the mice is unrecognizable by any other device no matter if is on the channel one two or three other thing to take in consideration is the mice is fully cordless and the usb c port is just only for power


Same problem, LED (red) flashing endlessly. Contacted support to carry out some tests together, probably resulting in a faulty card. They suggest buying a new one as it is currently out of warranty. Thank you Logitech for providing me with an expensive mouse that lasted more than 2 years


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Best answer, don't buy logi any more. I have MX2 and MX3, I suspect the battery is fine in the MX3 as it works for literal weeks on the red light flashing randomly for days at a time, charge it, no difference.

Checking reddit, the popular theory is warranty burnout, so the solution is to stop buying these expensive devices that are on the whole no better than something half the price if you look around, and last exactly until warranty expires before starting to randomly play up, strangely enough.

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