Help diagnosing DEAD APU nintendo switch

[slimmy182]

Hello, how I can tell for sure that APU is dead? There is any measures I can take? No power on, no charging battery

 

[de9ed]

with the battery connected, how many amp does the switch take?

 

[thesjaakspoiler]

Are those smd components around the APU not capacitors?
So measuring their resistance isn't telling much imho.

As mentioned above, first thing to do is to check all the voltages around the power management IC's.

 

[impeeza]

it depends on the state of charging, first few mA then can go up 2 Amp.

 

[slimmy182]

with the battery connected, how many amp does the switch take?

Whit DC in It does take 5v constant, not charging, no raising. If I plug battery or DC IC I can see 4V circulating. I need to take all the voltages around the power management IC's when i'm back home. Anyway this consol seems to had a reflow APU attemp as I see flux residue around main soc

 

[de9ed]

I would fix the charging issue first.

 

[slimmy182]

I would fix the charging issue first.

Thank you for the hint. So basically even if APU is supposed to be toasted, battery would still charge? Any advice what to look for?

 

[slimmy182]

I made a mistake, logic board is taking 5V but not charging at all. So, i've got 4v entering M92T36, but no output in pin 6/5 (0V)

 

[de9ed]

from experience, even if the apu is toasted, the charging circuit should still be working. you should be getting 0.4a 5v or fast charge.

 

[slimmy182]

So basically now I've to resolve charging/ not turning on issue. I'm really new to the switch, there’s no shorted caps around M92T36, P13USB, BQ24193. the usb-c port looks good. Anything to look for?

 

[slimmy182]

On MT chip I’ve got 0v pin 6 and 4V pin 5 when DC IN connected (no battery). Any idea what else can cause this?