Laptop seems to be stuck in sleep mode

Hello there!

I'm trying to fix my friend's Lenovo IdeaPad 100-15iby.
He accidentally tripped over the USB cord that was connecting the laptop and his phone, and at that moment the laptop just went kaput (the phone is ok btw).
The power LED on the laptop just keeps blinking, the manual says that the blinking LED indicates that the laptop is in sleep mode.
When I connect the AC adapter the battery LED turns on, which is what it normally does.
Holding the power button for more than 5 sec turns it off.
Holding the power button for more than 5 sec, with the AC adapter plugged, in briefly turns it off, and then it goes back to being all blinky and stuff.

I opened up the laptop and have tried the following:
-disconnecting the battery and holding the power button for 30 sec
-clearing CMOS
-reseating the RAM stick
-pressing the NOVO button (which supposedly resets the laptop to factory settings or something like that), I did that with the HDD removed

Also the CPU gets hot when it stays in the "sleep mode" for a while.
I'm really scratching my head over here; it's a curious problem it seems

Thanks for your time
 
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