Help with Acer Travelmate P258 ZRW

[sopik78]

Main power rails:

original BIOS other BIOS
+3VPCU PL6012 3.3V 3.3V
+5VPCU PL6013 5V 5V
+1.35VSUS PL15 1.35V 1.35V
+1.8V_S5 PL6 1.8V 1.8V
+1V_S5 PL11 1.02V 1.02V
+VCCIO 1.02V 1.02V
+VCCSA PL5 1.11V (0,85V after while) 1.04V
+VCCCORE PL4 1.01V (0.89V) 0V
PWM_A (EN +VCCCORE) 0.32V 2.6V
FCCM_A (EN +VCCCORE) 5V 0V
+VCCGT PL3 0.67V 0V
EN same as +VCCORE
+VCCGT PL2 0.67V 0V
EN same as +VCCORE

No image on lcd, HDMI and VGA

What should I check?

edit: first reading is for original BIOS, second for any other BIOS, DSC or UMA or ME CLEAN

[stingerchamp]

Re: Help with Acer Travelmate P258 ZRW

Not sure

But second bios is Uma as no vccgt

Vccgt with original seems ok, vccsa voltage agent is ok for CPU

If socket processor check with debug tester or with oscilloscope check frequency at core ic

Issue at core level processing