Asus n56jr NOT BOOTING

Hello guys, I need a bit of help...
Yesterday I decided to clean my notebook fans because it was overheating too much (92/93 °C after half an hour on pubg playing at 1280x720p everything set to low).
It's not the first time that I clean my fans, so I managed to do that pretty quick using only a soft brush.
After I assembled my notebook again, the pc will not start without giving any sign of life (The fan is
not working, neither the leds on the Off/On button, no BIOS)
At the beginning, I thought that I missed the AC connector or the On/Off connector, but I double checked and everything is in the right place... and that's where the nightmare started.
I really tried everything that I could have think of, I need suggestions on what to do now, thank you in advance.
I tried:
1) Changing RAM slot, removing the RAM for an hour and let it rest, replugged again.
2) Using another RAM from my friend that works at 100%
3) Pushing the On/Off button for 60 seconds in order to discharge any static charge
4) Checked the tension on the mobo and the AC PSU works, giving 19.5V to the mobo
5) Checked if the On/Off button is working, and it works, with a 3V stable that decreases to 1.5V if clicked
6) Removed the CMOS battery, did the pushing of the On/Off button again, tried booting with and without the CMOS battery
7) Tried booting without the SSD
8) Tried booting without touchpad/keyboard/speakers etc connectors plugged
9) I have Removed the heat pipes of the CPU and GPU, and I noticed that the thermal paste was out the die of the CPU, going towards some pins of the CPU. I cleaned the thermal paste from the CPU pins tried booting but nothing happens again
10) The external battery was not on the PC all the time, it was removed before starting the cleaning

 

With "PINS" of the CPU I mean this

 

Looks like very dry thermal paste, did you apply new thermal paste?
I don't think u'll have to worry.

Apply new thermal compound, then remove the CMOS batter, AC, Battery, holdthe powerbutton for 30 seconds, reassemble the whole thing, then try again.

 

I cleaned the chip removing all the thermal paste, and did what you said but still not booting...
( I know that is risky to not have thermal paste at all, but there is a little bit left on the heatsink, and if the pc wakes, I will immediately shut it down)
I mean... even without thermal paste it should boot, right?

 

Well it should. However your thermal paste is completely dry, you need to repaste it. Also the behaivior you're experiencing can be caused by your notebook being in a thermal shutdown state. I've had this with many notebooks, when the notebook gets really really warm it shutdowns itself or I shutdown manually with high temps and it will not turn on again, usually a full disassembly and reassmbly resets everything for me and the notebooks want to start again. I doubt you broke anything, so I don't think you should be scared of any defekt, the notebook simply acts like it wants right now.

It can also be some anti static measure, so try to take your notebook, take a towel and wrap it insde the towel. Leave it for an hour and see if it will startup again. This is a common solution for some notebooks that are noitorious for acting up like yours.

 

What should I wrap in the towel, only the mobo or the entire barebone with the mobo inside?

 

People usually wrap the entire notebook in it.

I disassemble the whole thing since it takes less time. Rmemeber to remove battery etc. when wrapping it in.

 

Have you tried boot up without ram inside to trigger Post errors?

 

Yep, still no signs of life (no fans, no beep, no leds, nothing at all)

 

Have you checked if there is a correct/special procedure to reset NVRAM for your model? I would ask in the proper threads/forum. I mean Asus own forum.

 

Maybe i forgot to say this, but you have to leave it for a while in the towel. We talk like a couple of hours. You don't simply wrap it in and then use it. 1 hour is bare minimum, but most do it for 3-6 hours.

If you're impatient, disassemble the whle thing, then reassemble it again. It should do the trick.

 

Nope, I'll try after the towel thing, thanks for the suggestion

Yeah, of course, right now the mobo is in the towel, I will wait till the thermal paste arrives at home (1-2 days)

 

Well looks like you disassembled it then. You removed the CMOS battery right?

 

Yep

While looking at the motherboard carefully, I noticed that this "thing" is broken. I don't know what it is, it seems rubber, but maybe I am wrong. It is a different material from the VRAM that you can see in the back
It is the BACK of the mobo, so where there is the CMOS battery slot

 

Thats for the battery.

 

Ok, I don't care, I use my notebook like a desktop plugged into the AC without the battery all the time

 

Did you assemble the whole thing yet?

Before I forget, can you make a photo of your mainboard back and front?

 

Right now is without any kind of thermal paste, I am waiting for Amazon for the delivery.
I prefer to put the paste before doing anything, here is the little baby

 

Update:
Tried to apply new thermal paste, after leaving it for 2 days in the towel... but no sign of life. (For precaution against other static charges I used synthetic gloves)
I will try to give it to a Reparation centre, hoping for the best D:

 

yeah this sounds like something might have gone wrong then.

 

Went to the reparation centre and they told me that I have done everything they would have done with a basic reparation.
The next step was searching for a short circuit in the mainboard and change the component (if possible) or directly the mainboard. This type of reparation costs 200€+ (260$+), I refused and took my now dead notebook at home... I think it's time for the Clevo upgrade!
Thanks @Danishblunt and @Papusan for you help

 

UPDATE: I have brought my pc to a Chinese reparation centre and with 60€ and a bit of black magic, they managed to fix it.
The only info that I could get was Motherboard Fix.

 

Dead BIOS image, very common on lots of Asus models, and everytime I had to repair and Asus laptop, flashing a OEM BIOS was my first step.

 

Thanks mate, I was really curious about my laptop illness, and I thought that I could never get to the real cause

 

In your time with the machine, did you note any physical damage to the board itself?

 

The only damage that I could find is this one.
I need a few days to get my hands on my laptop, but I don't know if I want to completely disassembly again in the hope to find a clue of what they had done.
Even if I am pretty curious, the fear of breaking it again is far more powerful than my curiosity