820-02020 A2338 M1 MBP Short pp3v3_s2

[Mortentoft]

Hello.
I have a question for you.
I have an 820-02020 A2338 MBP which takes 5 v. and 0.495 amp on one port and 20v and 0.120 on the other port. The machine had some liquid, but is not significantly damaged. It is shorted on pp3v3_s2 and pp3v3_s2_WLBT__ISNS and gets a bit hot seen on thermal cam. Aprox. 40 celcius at UL000, CL022, CL023, RL005 and in the surrounding area. Could it be UL000 that is short-circuited (no cracks, burnings or anything)? I have applied 1v and 0.800 amp directly in pp3v3_s2 nothing gets hot. I apologize if I ask a stupid question but I am rookie

 

[2informaticos]

Slowly increase the voltage; no more than 4V.
Set the amp limit to max on PSU first.

 

[Mortentoft]

Hi again 2informatiocos and others.
4 volt and 5 amp.... goes to 0.300 amp but get only fairly hot under UL000. If I remove the RD810 I get 20 volt and stable 0.000 amp. I've searched for a similar problem here in forum and found this one - could it be the same issue - U8100 short? I will write the good guy...

 

[2informaticos]

Do you have 5A limit PSU?
Doesn't help for voltage injection!
Get 20A one, or at least 10A.

 

[Mortentoft]

I have the Peaktech 6070 which has been used for cellphone... But I see I need to upgrade. I have an old one which can power up so I will try that one and let you know

 

[Mortentoft]

by the way... which DCP do you have? I need a new one

 

[2informaticos]

I have cheap 0-24V/20A, aluminium case.
Lot of them available on Aliexpress.
You can find with adjustable current too; not really needed, but shows the consumption.

For 100-150€ you can get digital model, with 4 memories.