Asus ROG GL502VS - bricked BIOS

[TheGiolly]

Hi,
I bought an Asus ROG GL502VS (that was supposed to be) with bricked BIOS.
I flashed the BIOS found in this post with a CH340G.
Now I get light on the power button, caps lock and white power indicator but the screen stays off and the fans don't spin.
I can feel that CPU and GPU get hot.
I already tried resetting the CMOS using the 2 jumpers (SMD pads) near the RAM slots with no luck.
Could somebody help me, please?
Thanks in advance

[TheGiolly]

Re: Asus ROG GL502VS - bricked BIOS

I discovered that the Parade PS8330B chip gets very hot, too hot to the touch.
Could it be the culprit?
----------
This is a Asus ROG GL502VSK, sorry for the mistake in the first post

[jasko_jacker]

Re: Asus ROG GL502VS - bricked BIOS

Try with another bios first (check if on the bios there is the correct vbios version), if not work you have to start testing all the main voltages.
have you tried if it displays with HDMI ?

[mcplslg123]

Re: Asus ROG GL502VS - bricked BIOS

remove that parade chip and then try booting again. Is it hdmi controller??

[TheGiolly]

Re: Asus ROG GL502VS - bricked BIOS

First of all, thanks to both of you for your replies!

Try with another bios first (check if on the bios there is the correct vbios version), if not work you have to start testing all the main voltages.
have you tried if it displays with HDMI ?

I already tried multiple BIOS dumps from other website and the behavior is always the same.
I have tried plugging a monitor in the HDMI port but I get nothing on the screen.
I would really love to start checking the voltages but I don't have a schematic for this laptop. How can I do?

remove that parade chip and then try booting again. Is it hdmi controller??

That's a 1-to-1 DisplayPort 1.2 repeater. If it is the problem, will the PC boot without it?

[mcplslg123]

Re: Asus ROG GL502VS - bricked BIOS

Yeh, just gone through the parade datasheet .It says:
"Supports DisplayPort and HDMITM/DVI dual-mode output"
So, i do beleive PC will boot without it though not sure.

[jasko_jacker]

Re: Asus ROG GL502VS - bricked BIOS

Asus use only boardview and for some board is available a small part of repair guide, unfortunately for this model a boardview isn't avilable.

[TheGiolly]

Re: Asus ROG GL502VS - bricked BIOS

Yeh, just gone through the parade datasheet .It says:
"Supports DisplayPort and HDMITM/DVI dual-mode output"
So, i do beleive PC will boot without it though not sure.

For now I think I'll wait to desolder it since I don't have a new one.

Asus use only boardview and for some board is available a small part of repair guide, unfortunately for this model a boardview isn't avilable.

I found boardview and repair guide for GL502VT. It's similar to my board but not quite the same. I can try to follow it..

Do you think that a debug card with ELPC support would be helpful in my case?

[Roham]

Re: Asus ROG GL502VS - bricked BIOS

would you please share Board view and schematic of GL502vt with me too? and Bios file if you have it.
Thanks

[jasko_jacker]

Re: Asus ROG GL502VS - bricked BIOS

request it in bios section