Predator Helios 300 not turning on after repaste

Last night I was cleaning the fans and dust, when I assemble them back together, turn it on and go for a game everything looks fine except the temperature went a little bit high, it’s around 80• even just playing on league of legends, so I decided to reapply some thermal paste(I’ve cleaned the previous paste before reapply) when I put it back up together, nothing happen.. seems the battery indicator is working fine, but usually when I turn the Helios 300 on the keyboard would light up but it doesn’t the screen goes black(not dead) and the lightbulb icon led light beside the battery indicator just lit up for like 4 seconds and turn off again, the screen brighten up in black for around 10 second and goes off.

what I’ve tried to do:
1.I tried to remove every hardware to check which is malfunctioning the ram the hard disk the fan all working fine. Doesn’t change the result of turning it on.
2.I tried to unplug the battery nor RTC and run it on AC adapter, no luck as well

everything happened too fast I was just using it like 3 mins ago now it’s not working I’m kinda frustrated. I need some help