So looks like i get a picture but without any backlight. I Had the chance a second board with the case but still no backlight.
So do i have to change the display in this case?

Hi all,

sometimes i'm in need of a charger / tester for very small batteries and even if my multimeter doesn't show anything there is a chance that a smart charger helps to revieve. I'm happy with my Keenstone smartcharger and i made a small mod just to use it with smaller batteries like in smartwatches or even camera batteries with special contacts.

Soldering wires on the charger contacts and using needles as probes. I covered both with a shrink hose with integrated solder.
My first work was to bring my Samsung watch battery back to life with was not recognized...

Hi all,

title says it all. I have Airpods Max which no charing light. Reset lights show up when i connect a USB charger and push the buttons but not loading or bluetooth reaction. USB meter shows 5v, 0,6a and 1,8-3,2w (differs on used charger).
The videos i found about repairs are more something like a try and error with changing parts or battery replacement but no direct fault analysis.
So maybe anybody here has experience in repairs or can help me to locate the problem? My stomach tells me that i need a new battery but 50€ for a feeling is too much.

I get 0,4 Ohm so it should be fine?
As written before after replacing QP800 and QP802 the board startet but without any display. Strangely i had a short on pad 2 of LP800 after removing it. Replacing QP803 and QP801 fixed it. Maybe this will finally fix my display issues....

It looks bad but maybe i can still use it?...

Maybe i found my problem. Looks like LP800 is done. Right now i'm looking for a replacement with 2.2 µH, 8 A.
Any ideas what i can take or if there is anything from another logicboard if not new? I have A2141 and A1932 spares here but didn't find anything with same specs.

Sorry was a bit busy but had a moment today to look at this board again. 8409_I2C_SDA line only shows 8ohm so the problem ist somewhere between the parts you mentioned.
Removing U6200 didn't help but i had no time to do anything else....