Asus K55VD Rev3.0 NO GFX Core Volt !!

[battery.12v]

Hello Everyone !! i have this Asus K55VD power on but no display ...
checked with its repair guide ... all test points are OK expect one GFX_CORE ... any idea please

[mcplslg123]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

This mb is known to have this issue when bios gets corrupted. Flash a known good bios-it is very likely to solve your problem.

[battery.12v]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

This mb is known to have this issue when bios gets corrupted. Flash a known good bios-it is very likely to solve your problem.

i flashed one but no luck i will try another one

[mcplslg123]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

Post your original bios backup in bios section. We can merge it with asus webupdate for bios. that way you can rule out bios issue.

[mcplslg123]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

What is the resistance on GFX coil??

[battery.12v]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

What is the resistance on GFX coil??

4.5 Ohm

[battery.12v]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

Asuus K55VD No GFX_CORE ... i need some guidance in troubleshooting it .. i flashed Bios Three Times but same issues
GFX Pgood is Low , GFX RST is low

[battery.12v]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

BAD BOARD
pin 10 0.59V GFX_IMON
pin 11 0V GFX_VSEN
pin 17 0V H_PROCHOT_S#
pin 19 0.79V GFX_TSEN
pin 23 0V GFX_RESET
pin 28 3.3V CPU_VRON_PWR


A Working BOARD
pin 10 0.61V GFX_IMON
pin 11 1.02V GFX_VSEN
pin 17 1.05V H_PROCHOT_S#
pin 19 0.86V GFX_TSEN
pin 23 0.0V GFX_RESET
pin 28 3.3V CPU_VRON_PWR


What Signal i have to check First ???

[mcplslg123]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

dramrst on pin 30 present??

[battery.12v]

Re: Asus K55VD Rev3.0 NO GFX Core Volt !!

DRAMRST# present 1.53V