ASUS TUF 506 powers off after about 10 seconds due to heat

[survivalbloke]

This laptop come in with liquid damage. I located a couple areas on the board which honestly didn't look bad at all. I ISA them and cleaned up - can't even tell anything happened. However, when I power up the computer, it will shut off after about 10 seconds. I discovered it seemed like the fans weren't coming on because the board was getting mad hot right around the battery charging mosfets and coil. Anyhow, I checked under the thermal camera with just the power adapter connected but the machine off. I have marked what is warm at that time. Once I power it up, the coils near CPU vcore start heating up like mad, until it powers itself off.

board is DABKXBMBAD0 Rev. D

Thoughts?

[Sephir0th]

Re: ASUS TUF 506 powers off after about 10 seconds due to heat

Yes, something is wrong with your measurements since the top most mosfet is very likely the charging low-side and for this reason has connection to GND. So either here is something very wrong with the GND plane or you need to redo the measurements properly

These BQ24780S die easily and it should be handled as a suspect in any case. At what voltage is the battery rated? 17V sounds a lot for battery charging.

The hot coils related to the CPU doesn't Sound promising though. Did you exclude a partial short of the main power rail, respectively a high-side short with +VCC_CORE at least?

[SMDFlea]

Re: ASUS TUF 506 powers off after about 10 seconds due to heat

board is DABKXBMBAD0 Rev. D
Thoughts?

FA506IV ?

Link to schematic/boardview - https://www.badcaps.net/forum/showth...ht=DABKXBMBAD0