Why won't my laptop turn on?

I just borrowed my friends Compaq Presario V4000 to do some free servicing for him (disk fragmenting, removing adware/spyware, etc.). I was using it for about an hour and the battery was starting to get low. I plugged the AC adapter into the wall, and in the computer to charge it. Everything was working fine. After about 2-3 hours of use, the computer just shut off and will not come back on! No warnings!

There is no sign of life at all. No lights, fan noise, etc! I tried unplugging the AC adapter and holding the power button for 30 seconds. I also tried it with the AC Adapter connected. Nothing!

I did notice the AC Adapter getting kinda hot before the shut off. I'm thinking that the heatsink got disconnected and the overheat caused the cumputer to turn off suddenly. I heard this is a problem with Compaqs. If this is the case, should any led lights come on or anything? No matter what I do, it will not come on.

Someone please help! I want to fix it before my friend finds out! Thanks

Why won't my laptop turn on?ktm

Remove the battery and power unit plug, and press the power button. Attach the power plug, and try to boot (with no battery in)

If it works, power down, reattach the battery, and try again....might just be static build up....

Why won't my laptop turn on?nortan

Compaqs are terrible. Buy a dell or an HP.

Second, it could POSSIBLY be your motherboard burned out, and the AC Adapters are usually always hot so don't worry about that.

People always think its a virus that did something, 90% of the time its the stupid person that did it.

It COULD be hardware failure and the laptop plain out sucks.

Goodluck.