Hp envy issues

[GrandFatMan]

Hello everyone

 

Bit of a strange one. I'm trying to fix an hp envy for a friend. It won't turn on. I've reseated the ram, tried known good ram, taken out the cmos battery and put it back in after holding the power button, same with battery. No luck.

 

Here's the strange part. The power light comes on when pressed, the harddrive spins, but can't hear any activity. And the cpu fan comes on for about 2 seconds then shuts straight off. I thought it could be the display, but its not even working with a known working monitor connected. Any ideas? 

[Fasauceome]

What caused the initial issues?

[GrandFatMan]

It's unknown. Apparantly it was given to somebody. They tried to turn it on and it wouldn't. There's no evidence of water damage on the board, and no obvious drop damage either. 

[SenKa]

3 hours ago, GrandFatMan said:

Hello everyone

 

Bit of a strange one. I'm trying to fix an hp envy for a friend. It won't turn on. I've reseated the ram, tried known good ram, taken out the cmos battery and put it back in after holding the power button, same with battery. No luck.

 

Here's the strange part. The power light comes on when pressed, the harddrive spins, but can't hear any activity. And the cpu fan comes on for about 2 seconds then shuts straight off. I thought it could be the display, but its not even working with a known working monitor connected. Any ideas? 

Knowing what I know of HP's, it's failing POST at some point and shutting off. You wont get any display until POST is passed. Try resetting CMOS, swapping RAM configs around (1 stick in 1 slot, 1 in another slot, different sticks, ect.), and a simple google of "HP ENVY [model number here] turns on and turns off again, no display"

[GrandFatMan]

Tried all that. Even tried known working ram in each slot seperatley.