Switch Liten No Power / 0,04A 12V

[Twsti]

Hello Guys,

I'll make it short and quick.

When I have the switch connected to power, the ampmeter shows 0.043 amps at 12V.

The screen doesn‘t turn on. And there is no sound either.

The battery is at 3.7V.

I have replaced the USB port and it appears to be functioning well so far. I have also tested each pin against each other with a USB test board to check for any shorts.

I didn't find any shorts on the M92 chip. Here are some screenshots of the chips and where I measured ground.






In some parts, there are ground connections on both sides. However, I am not sure if this is normal. For example, on the MAX77812 chip.

I found this picture in other posts and also took measurements to see how it is for me.






I grounded at the USB port at the points.
I have these values at the measuring points:
A=12V / B=12V / C=12V / D=4.2V

What else can I check or replace?
Does anyone have any more ideas?

[Twsti]

So. I fixed the Ampere. I have now 0.46A but still no Picture and Sound.

[redbaron1007]

Even if there aren't any shorts on the M92 chip it may still be the issue. I don't know what kind of damage thee was to the port, but it's super common that damage to the port will kill the m92. I've seen plenty before that didn't have any shorts on them, but were still faulty and pulling around the same amps you're reading.