CPU or System board?

[raoul_1101]

Hello all,

I have an HP dv6700. It does not turn on. To be more specific, it does 'power up'. I can turn it on. All the media lights turn on, and you can hear the fans run at full speed for a few seconds as if it's trying to POST. Then, the computer immediately turns off. Meanwhile, there is no picture on the LCD, I haven't tried an external, there is almost no point. After a few seconds, the computer tries to boot again, doing the same thing- shuts off, tries again, shuts off, etc... I tried narrowing down the problem. I tried both DIMMs separately in both slots, took out the battery, took out both the CD drive and the HDD.
Even as a precaution, I took off the power button to see if it was sticking, and it was not.

At this simplified state, I think it must be either a CPU or System board.

Does anyone have any input, questions, or advice?

Thanks all!

[The_Other_One]

Sounds very similar to my grandparents old Compaq. It essentially is doing the same thing, though when it shuts off, it comes right back on. No screen/backlight or anything. However, they had some problems before this...

Anyway, it's pretty uncommon for a processor to die unless it's run without a heatsink or something crazy like that. I'd say it's very likely the motherboard's shot.