Asus X55ld
This motherboard doesn't power-up, it stops at the very beginning of power-up sequence.
Signal PCH_SLPSUS# from PCH/CPU is always at low level
It has +5VO, +3VO and +1_05VSUSO but no +VCCIN (vcorecpu) +1_35V (ddr3) etc.
Has some pulsating voltages, as +1_05VSUSO, +3VSUSO_CPU, etc and signals like P_LS_3VSUS_EN_10.
The weird thing is that pressing power button, all pulsating voltages goes normal, but other voltages are still missing.
There are no shorts at big pwm coils, and bios/ITE have been reprogrammed with several good dumps.
I think the problem is PCH_SLPSUS# from cpu, probably because cpu is damaged.
Anyone have had a similar issue?
Вложение:
PCH_SLPSUS#.PNG