[SOLVED]820-3662 Blown Q8020

[rany]

Q8020 looks burnt. Literally has a hole in it. Afraid to power up and cause damage, as I only have 1 good Q8020 left.
Any hypothesis on what can cause this?
Also, PP3V3_SUS has 0.7 OHM resistivity to ground. Is this normal? The fucked up donor board is measuring the same resistivity on that line.

 

[dukefawks]

First you need to remove the short or Q8020 will die again. Inject voltage and see what heats up.

 

[rany]

The customer only wanted to buy (they can replace it themselves) or replace Q8020 because they spotted that it was fried and brought it to have only this fixed. I replaced and cautioned that the cause is not resolved and quoted them for a future "comprehensive repair" from which I will deduct my fee for this single replacement. If it comes back I'll update this thread.

 

[dukefawks]

Those are customers you DON'T need!
He will install a new Q8020 and it will instantly fry again because of the short or he will just kill the board. Then he will be back to complain.....

 

[larossmann]

duke and I are almost always on the same page with customer service

 

[rany]

Customer didn't come back yet. Can we mark it as "closed" for now and if needed will open a new case later on.