My computer screen goes Black...or it will Freeze up Pavilion M9040n

My computer will go blank and black after 15-30 minutes use...or it will freeze up and I cannot use any keys or mouse.
I can reboot after a short term and then the same thing will happen again.
Any Guidance will be appreciated.
Thank you,
Herb J

well good sign or good sign maybe a strong word
it mean that not all of the device have been damaged by the fluid
but it does not really mean that the screen will ever work again
when drying in rice make sure you don't
1 conceal it so the vapor can't escape or it will not dry enough
2 make sure to leave in on a heating source like a heated floor or radiator to speed up the proccess of the vaporising

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