P151HM1 sleeping issue

I have a p151hm1 from malibal for about a year.
recently, the laptop just can't sleep.
when I close the lid, or press FN+F4, the screen goes off, but the light on the power button is still on, so as the fans.
from this situation, I can't bring the computer back on, and the only option is to force shutdown.
does anyone know how to fix this issue? thanks

 

have u upgraded to a different hard drive or possibly an ssd when this issue started?
if yes, check and see if there is a firmware upgrade available (beware: make a backup first before updating, since most firmware upgrades are destructive and u can lose all ur data)
if not, go ahead and download crystaldiskinfo to see if ur hdd is alright
aside from that, u should probably also check ur ram with memtest86+, see if they show any errors.
if everything seems to be in order and the problem still persists, try a fresh windows install.

cheers

Sent from my Galaxy Nexus using Tapatalk 2

 

Note any software changes you may have made. Double check your power management settings, and if everything looks good, consider a restore point - in case of corruption.

If it's hardware related, you're in for a fun ride.