Hello everyone, I hope you are doing well. I have an Asus GL553V laptop in my hands. It came to me because the laptop would turn off shortly after being powered on. Upon physical inspection, I found some damaged power regulators.
The SIC631 that powers the CPU had issues. One of them was physically damaged, and another one had continuity to ground at the output (0.1 Ohms). To avoid further problems, I replaced three of them. (U8001 had physical damage at the input, U8002 seemed fine, U8003 had continuity to ground at the output).
The issue was partially resolved; I can now turn on the laptop and use it in safe mode.
The problem arises when I try to use the laptop in normal mode. For some reason, the U8003 MOSFET overheats, causing the laptop to shut down as a protective measure. I've checked capacitors for any faults but haven't found any solution.
I'm unsure if the CPU was damaged, which could be why it shuts down when operating at full capacity.
The voltage measurement I have on VCore is a stable 0.8V, the same as the SIC output (Pins 16-26).
Honestly, I'm not sure if there's anything else to do or if the CPU was dead/damage
Any comments or help would be greatly appreciated. (I'm attaching the boardview, PDF, and a video of the issue.)
Thanks!
The SIC631 that powers the CPU had issues. One of them was physically damaged, and another one had continuity to ground at the output (0.1 Ohms). To avoid further problems, I replaced three of them. (U8001 had physical damage at the input, U8002 seemed fine, U8003 had continuity to ground at the output).
The issue was partially resolved; I can now turn on the laptop and use it in safe mode.
The problem arises when I try to use the laptop in normal mode. For some reason, the U8003 MOSFET overheats, causing the laptop to shut down as a protective measure. I've checked capacitors for any faults but haven't found any solution.
I'm unsure if the CPU was damaged, which could be why it shuts down when operating at full capacity.
The voltage measurement I have on VCore is a stable 0.8V, the same as the SIC output (Pins 16-26).
Honestly, I'm not sure if there's anything else to do or if the CPU was dead/damage
Any comments or help would be greatly appreciated. (I'm attaching the boardview, PDF, and a video of the issue.)
Thanks!
