Asus R751L HDMI and Internal lcd Black, VGA out OK

[passete]

Like the title says:
I have a asus r751l
motherboard : X750LN REV.2
First pc wasn't booting, after flashing the bios with dump found on the web, it's now booting, everything works, except the internal display and the hdmi,with vga all works 100%.
Please help guys

[passete]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

Any expert arround please ?

[LP_tekh]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

Try to reflow the GPU if there is or the northbrigde chip

[passete]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

Try to reflow the GPU if there is or the northbrigde chip

As i suspected, there is no change after gpu reflow !
Laptop on works only the vga output, both gpu's are detected and working.
There is no signal at all on hdmi, as normaly my monitor detects if an hdmi device is atached.

[kazia]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

my be you should flash again, in case that dump mismatch. it's just my opinion.

[passete]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

my be you should flash again, in case that dump mismatch. it's just my opinion.

I have flashed At least 7 times :
With dumps found on the web for this mobo, with Repaired corrupted (courtesy from ala_borbe), with ME repaired, etc ...
Result is always the same, everything works except hdmi out and internal display.
Of course, i also replaced the internal with a tested working one, same resiult .
Any other tips guys ?

[meritosari]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

could be LVDS translator issue, did you see Realtek RTD213x series QFN32 or QFN48?

[passete]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

could be LVDS translator issue, did you see Realtek RTD213x series QFN32 or QFN48?

You mean this chip ?
I can't read the reference.

[meritosari]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

Yes!

maybe that IC was bad.

https://cdn.badcaps-static.com/pdfs/...cbc54b8c8e.pdf

see P.25

[passete]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

Yes!

maybe that IC was bad.

https://cdn.badcaps-static.com/pdfs/...cbc54b8c8e.pdf

see P.25

Can you please tell me which pin do i need to measure ?
Thanks buddy

[meritosari]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

check pin 22,18,5,17,15,43,11.

then check pin 20 should be 3v

[passete]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

check pin 22,18,5,17,15,43,11.
0,80then check pin 20 should be 3v

Ok, i will check this !
Is this chip good in case of replacement :
http://www.ebay.fr/itm/281741074136?...%3AMEBIDX%3AIT

EDIT: on
Pin 20 i have 0,89 Volts
Pin 11 - 0,55V
PIN 5 - 3,35 V
Pin 22 - 3,34V
Pin 43 - 0,54 V

The others i can't measure without creating a short.

Thanks

[passete]

Re: Asus R751L HDMI and Internal lcd Black, VGA out OK

Do need to replace this chip or there is nothing wrong it ?

@meritosari