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

2informaticos

Administrator
Staff member
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.
 
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

Administrator
Staff member
What caps removed???

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