Need some help on this one.

Just had a Switch that ain't strating anymore. The last owner told me that it doens't used it during a long time and when he tryied it, it didn't start anymore...

So i check the battery inside and i got 2.5V so i think this one's dead, no?

When i plug the ubc charger i got those mesures :

15V

0.12A

https://zupimages.net/viewer.php?id=22/48/en2b.jpg

I tried an other battery ( 3.8v tested) and i got those measures :

15v

0.47A

https://zupimages.net/viewer.php?id=22/48/tdae.jpg

better ones but still not booting, and no screen nor sound ...

I check the M92,the PI3 USB and the BQ24 chips, it seems to be okay, no caps shorted.

But i've got a lot of caps shorted around the 3 MAXX77 chip.

https://zupimages.net/viewer.php?id=22/48/zklt.jpg

https://zupimages.net/viewer.php?id=22/48/qvrs.jpg

I don't know exactly which ones must be coils or caps, but i know this is not normal for somes. I know maybe there are caps with small resistance that can bip tduring test.

Tx a lot ! 

Greg