This came in with badcaps in PS and VRM input. No boot.
Replaced caps still no boot. Problem is in VRM\CPU area. VRM output 0.57V with no CPU present but fan connected. 0.06V with CPU present. Have checked for shorted caps, none. Have checked for shorted or melted MOSFETs , none.
I suspect CPU is burned fan and heatsink clogged with dirt (now clean) there appear to be some hot spot colours on the top of the CPU, green at centre flairing out to black then brown, like a spark burn.
I expected the VRM output to be higher with no CPU load. Is VRM output stable with no load??? What voltage should be expected??
CPU is 478 Celeron 2.4Ghz. Vcore spec 1.25-1.4
Comment please
Replaced caps still no boot. Problem is in VRM\CPU area. VRM output 0.57V with no CPU present but fan connected. 0.06V with CPU present. Have checked for shorted caps, none. Have checked for shorted or melted MOSFETs , none.
I suspect CPU is burned fan and heatsink clogged with dirt (now clean) there appear to be some hot spot colours on the top of the CPU, green at centre flairing out to black then brown, like a spark burn.
I expected the VRM output to be higher with no CPU load. Is VRM output stable with no load??? What voltage should be expected??
CPU is 478 Celeron 2.4Ghz. Vcore spec 1.25-1.4
Comment please
Comment