820-00281-A Only 5v and 0.26amp not turning on

[2informaticos]

So you have a problem on 3V3_G3H power rail.
Inject 3.5V there and use a performant thermal camera.
0.035 is far from short; possibly nothing gets hot.
Just try to detect what component gets a bit higher heat signature than other.

However, I recommend to inject voltage starting with 1V; increase slowly, monitoring current consumption.

 

[MeTech Turkey]

Please do not get angry if these are silly ones but I have 2 questions that I dont know the answers;
1) Do I have to keep these 3 removed caps when I am injecting the 3.5V?
2) I dont have thermal camera at home and I have no shop anymore. I heared that lighet gas can be used but I dont know if it is harmful for the logic board or not? If yes then I have to order a thermal camera and wait around 10 days to arrive. Or do you have any other suggestions?

 

[2informaticos]

What caps removed???

Alcohol tehnique doesn't help in this case.
Unless you are lucky and some chip enters in thermal avalanche.

 

[MeTech Turkey]

I mean F7000/1 and R6923 as caps removed so keep these removed then inject voltage right?

 

[2informaticos]

Of course.

BTW, these are not caps...

 

[MeTech Turkey]

I have found a thermal camera but unfortunately I cant see any shorted or heated parts. But now all the metal shileds stayed soldered I hope the problem is not under one of them but generally I dont see any heated part to be honest. So what is your advice to unsolder all the metal shields and check again or something else?