Steam Deck 14.3v 0amps

[bogosort]

Hello,

I have this steam deck that has no current draw. I did a visual inspection and found nothing.

No dead short either, but these caps show 20-30ohms.





Any idea where to start? Thank you!

EDIT:

Noticed something with voltage. Is the component in green faulty?

[stj]

Re: Steam Deck 14.3v 0amps

what is the white staining? liquid spillage?

[bogosort]

Re: Steam Deck 14.3v 0amps

what is the white staining? liquid spillage?

Looks like thermal paste, I have no idea.

Upon continuing diagnosing, I have found some pins on the charging IC that have 0.2ohms to ground.

Here is the IC: https://cdn.badcaps-static.com/pdfs/...b3d10ef42c.pdf

Is it normal if these pins are shorted to ground? Others are too, but I'll start with these :


Circled in blue

Thanks

[stj]

Re: Steam Deck 14.3v 0amps

the thermal paste is pink,
the white stuff is all over a buck convertor circuit!

[bogosort]

Re: Steam Deck 14.3v 0amps

the thermal paste is pink,
the white stuff is all over a buck convertor circuit!

I have to scratch to remove it. Do you think it could be metal liquid paste, but then later replaced with pink thermal paste?

I'll try cleaning with alcohol

[stj]

Re: Steam Deck 14.3v 0amps

those pins may be o.k. - 7,8 & 10
does this have a battery or just external power?

[stj]

Re: Steam Deck 14.3v 0amps

it's not liquid metal (galium), that would disolve aluminium and probably solder

[bogosort]

Re: Steam Deck 14.3v 0amps

those pins may be o.k. - 7,8 & 10
does this have a battery or just external power?

I have both external power and battery.

Original owner said it stopped charging after changing SSD.

The steam deck continued working until the battery died, because it couldn't charge anymore.

I read online that sometimes SSD can take more current than the chip is rated for, thus frying the charging IC.

What do you think? How can I check if the chip is bad?

Thanks!

[stj]

Re: Steam Deck 14.3v 0amps

do you have the old ssd?

[bogosort]

Re: Steam Deck 14.3v 0amps

do you have the old ssd?

I actually don't have the other one, just the original ssd

[stj]

Re: Steam Deck 14.3v 0amps

i asked because trying the original would be interesting - incase it works again.