I have a system I'm repairing that came in for overheating, which also had a busted USB port in the back.
Reapplied new liquid metal to the system and got the BLOD.
I then found a bad Fuse on F3501 and replaced it.
My client also found out that the system had fallen, and that's how the USB port was broken.
I found a short on the cap in the photo, but the cap isn't shorted off the board. The cap isn't shorted on the board if I remove the black chip next to it (I think it's a diode, not sure), or if I remove the inductor.
UART readings say: Error Code: 80050000
Reapplied new liquid metal to the system and got the BLOD.
I then found a bad Fuse on F3501 and replaced it.
My client also found out that the system had fallen, and that's how the USB port was broken.
I found a short on the cap in the photo, but the cap isn't shorted off the board. The cap isn't shorted on the board if I remove the black chip next to it (I think it's a diode, not sure), or if I remove the inductor.
UART readings say: Error Code: 80050000
- Meaning: SoC CPU VRM power failure (2 phases)
- Source: VRM section powered by the dual-phase PWM controller.
- Implication:
- The VRM isn't successfully delivering power to the SoC (APU)
- Possible causes include:
- Bad PWM controller
- Damaged MOSFETs
- Shorted/burned ceramic caps or missing feedback components
- Corrupt or incomplete power enable sequencing
Attached Files
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