ASUS K54LY black screen

[gcomputers]

Hi i have this asus with black screen , but the caps lock and numlock function when i press the button led is on , no screen with enternal and external screen .

Reballed gpu , just received new CHIP replace it no changes black screen .

Flashed bios , changed CPU (i3 i think) booooooooooooo.
I cannot find any schematics.

Any suggestion please

[rtstorm]

Re: ASUS K54LY black screen

i have simmilyr issue, did you read my thread? https://www.badcaps.net/forum/showthread.php?t=46709

[gcomputers]

Re: ASUS K54LY black screen

Thanks i read it but do not help , I have before the same mode but not solved it . Now i replaced with new Gpu

[gcomputers]

Re: ASUS K54LY black screen

Any idea please ?

[atsio]

Re: ASUS K54LY black screen

I suppose next candidate is the PCH. Just for piece of mind before reballing - replacing it, check resistance on coils near it.
Most newer designs that use Intel's PCH have problems with it rather with the GPU (personal experience)

[gcomputers]

Re: ASUS K54LY black screen

Thanks Atsio for the reply .
This is my PCH just ?
And around it in some poins i have 7.8 or 8 ohm resistance.
What do you think i do a reball of PCH

[atsio]

Re: ASUS K54LY black screen

Yes, that is the PCH.
8 ohm is not a short and also not normal for supplies of PCH. Where exactly do you have those readings (photos)? What is the ohm reading of you multimeter when you place your probes on two different ground points on the board?
As I pointed earlier you should check resistance on coils relative to ground.

It would be nice if somebody with a working board would give us his/hers readings on all major coils.

[gcomputers]

Re: ASUS K54LY black screen

Those are points that i measured .
Thanks so much

[gcomputers]

Re: ASUS K54LY black screen

and

[atsio]

Re: ASUS K54LY black screen

What is the voltage (with power) on the points that you have 7,8 ohm?

[gcomputers]

Re: ASUS K54LY black screen

1.04v and 1.1v with power on laptop

[atsio]

Re: ASUS K54LY black screen

I think you should replace the PCH.

[gcomputers]

Re: ASUS K54LY black screen

replace or reball first ?

[atsio]

Re: ASUS K54LY black screen

I do not think reballing will do any good. It's up to you. Check again resistance after removing the HM65.

[gcomputers]

Re: ASUS K54LY black screen

I just removed one HM65 from a scrap board but i don t have stencil for it .
I ordered the stencil i will advice when i receive

[angel-boy]

Re: ASUS K54LY black screen

i have a problem with x54ly, rev 2.0
when adapter insert , laptop automatic power up, "power/capslook/wireless/num pad LED`s are all on"
no turn off from button, the same problem with battery

i try bios, i change RT9045 , change RT8206A , another cpu, another ram memory , the same problem

any ideea ?

[angel-boy]

Re: ASUS K54LY black screen

come one , anyone ? help

[highpulse]

Re: ASUS K54LY black screen

as atsio say , for my experience specially on asus models , are PCH related and usually after replacement all good , pch are not good for reball , alltough i made few work reballing them , until now then never came in , but ... im more turned into replacement

[highpulse]

Re: ASUS K54LY black screen

angel boy , also chek bios flash
corrupted bios on does models , make this happen also , im going to upload a good working dump

clean ME

[angel-boy]

Re: ASUS K54LY black screen

all the laptop with this problem , 4 led on , it was bios problem , but this one ,wont work.

i change todat ITE, the same problem. tomorrow i will whrite your bios with me clean , and see.

i dont know if pch is the problem. tks man.