ASUS ROG GL502VS does not POST or fan spin

[waakye]

Good day everyone,
I have with me an ASUS Rog GL502vs that exhibit the following symptoms:
When the power button is pressed, the caplock and power button LED turn on. The laptop does not post. The fans does not spin. The GPU and CPU become warm. I have flash the bios and same symptoms persist.
please, can someone help me fix this laptop.
Thanks in advance. I have attached some pictures

[C0dR]

Can you check the CPU and RAM Voltages when its turned on?

[waakye]

Hi C0dR,
Thanks for replying. I do not have a board view nor schematic for this board but I will greatly appreciate if you can tell me where to take the measurements.

[rtstorm]

If you have a lupe or microscope do a detailed visual inspection of the board, search for burned components, maybe some physical damage or water damage.

[waakye]

Thanks rtstorm for replying. I scan the board and there seem to be no water damage. One thing I noticed is that whe I disconnected the fan and plug it half way and turn on the laptop, the fan spin fast but no POST, no image. The power Led and the Caplock are on. All the voltages on all inductors are present.

[waakye]

I also flash several bios bin and same result.

[waakye]

Does this board need the 2133mhz Ram frequency in order to function?

[waakye]

Can someone please help fix this laptop. Is it beyond repair?

[mcplslg123]

https://www.badcaps.net/forum/troubl...-and-boardview

schematic and boardview already posted in the forum.

[myth77]

maybe i am not seeing good but on the first picture that gpu ram seems blown? also right of that ram i can see mosfet also burned? But maybe its just bad picture...but it is cleary someone worked on that area because there is discoloration and you can see cooper in that area.

[waakye]

Thanks mcplslg123.

myth77, the picture is the light from my microscope.
I will look again if there are any burns.
It just strange because the laptop fan spins and the CPU and GPU is warm when you press the power button but no post no image

[SMDFlea]

Thanks rtstorm for replying. I scan the board and there seem to be no water damage. One thing I noticed is that whe I disconnected the fan and plug it half way and turn on the laptop, the fan spin fast but no POST, no image. The power Led and the Caplock are on. All the voltages on all inductors are present.

Is that liquid damage or has it been reworked in that area

[waakye]

Thanks SMDFlea!
It seemed to flux. Most likely it was reworked. I will review that area again.

[waakye]

Does anyone has a repair manual on how to repair this mono. It seems that all voltages at the inductors are all present.
Thanks

[waakye]

I measure the resistance on all inductors and there is no short. One thing I noticed is when I try to disconnect the fan connector, the fan fast spins. Any help guys?

[waakye]

The Power supply shows 19.5V and 0.64Amps but no activity at laptop.
Can someone please help me out?
Thanks

[waakye]

Any help guys? 🙏 🙏

[waakye]

All voltages are present except the CPU. GPU voltage is 0.8VDC. The CPU inductors measures 2.1 Ohms and the GPU inductors measures 0.4 Ohms. Any help will be appreciated.

[waakye]

I removed and measured the source to drain of all mosfets circled in the red and they all measure 0.125VDS in diode mode. I guess it means game over?