Hi, trying to repair an Asus n551jk rev2.0 (no lcd, no hdmi video output)

Already tet with a new bios dump.

All main voltages present, but there is not data communication with lcd panel. (no EDP_AUXP, and no EDP_AUXN)

I'm trying to convert to uma with PCB_ID0 and PCB_ID1 resistors but no success. (have no information about uma conversion)

Can anybody help with this board?

Typing error: Already test with a new bios dump.



This two signals come from cpu to lcd panel, so cpu dead?

It seems to me a little rare, shouldn't it be generated by PCH or GPU?

CPU is not dead, as long the laptop loads the operative system. (it can load linux from usb also)

This mobo is a nightmare.

Where can I dig?

Look POST code.

Post code seems to be normal as you can see in this photo.


It stops in code AFh while loading linux.

Is there any chance to convert to UMA?

Thanks.

Some good news, it has video output trough display port.

As you can see in the screenshot, only intel hd graphics is active:

I'm still working on this board but can not get any information to convert it to uma. (but trough display port it works only with intel graphics)

I want to get a bios with discrete gpu disabled, or modified the bios with amibcp, but it give an error "it is not an aptio v"

Can someone indicate where to download amibcp ver. 4.53?

Thanks.

Hi, a friend give me a copy of amibcp 4.53 and now I can modify bios dump.

I have modified the value of Graphics Configuration, Primary Display, from "SG" to "IGFX". ( to force intel graphics)

Laptop works as before, only display port is working. (no lcd panel, no hdmi)

Next item to be modified is "iGPU Port Configuration", now is in "Disabled" state.

Can someone tell me the items to be modified?. (its a boring work)