Logitech MX Master 3 repair, not charging

[NutritioN]

Hi,

I got one of these at an okay price second hand, knowing I could source a new battery if it was on its last legs.

It worked for a few weeks then didn't seem to hold charge or charge at all. So I got a new battery but that has the same issue. Is there such thing as the charging circuit going bust? Anything else I can try?

It feels like it stores a tiny bit of charge then dies. Even when plugged in, so the mouse doesn't work as a tethered mouse.

Plug in to charge = green light pulses
Turning on while plugged in = can pair (number flashes, and pairs)
Using while plugged in = seems to work for a few seconds then turns off.

 

[NutritioN]

I've tried all sorts! USB off a power strip, Google phone charger, turned off and plugged into desktop USB powered hub...

All seem to have the same impact.

 

[NutritioN]

There was nothing visible that I could see, I didn't go as far as taking the whole PCB out. From where the USB power in goes, I think it might be worth looking underneath the PCB.

Thanks anyway.