Question Laptop won’t start after replacing thermal paste

[LilApplication]

I have a ASUS ROG STRIX GL502VY. i decided to change my thermal paste after my GPU started crashing. My GPU started crashing without overheating or overloading and I have tried to fix it by under clocking and every other option I had but nothing has worked I cannot open anything heavily graphics based or else it just <<Edited by moderator>> and I have to restart my computer to do anything again and it started <<Edited by moderator>> a lot as I bought this laptop for around £2K... Anyway I replaced the thermal paste and reset everything in terms of inside the computer, put all the screws back in and when I tried to turn on the laptop, it just doesn’t work. PLEASE HELP ME ANYONE

 

[COLGeek]

Did you disconnect any of the flat ribbon cables when you disassembled the laptop? Sounds like you may not have re-connected everything properly.

 

[LilApplication]

Did you disconnect any of the flat ribbon cables when you disassembled the laptop? Sounds like you may not have re-connected everything properly.

I only unplugged the battery just in case and didn’t really touch anything else so I really do not know and I have literally been checking every cable to check if it is unplugged but so far I haven’t been able to find anything so I’m certain that I don’t anything unplugged.

 

[COLGeek]

When you press the power button, do you detect any fan movement or flashing LEDs?