Need help with hp pavilion 700

The power supply comes on, does it stay on or shut back down? When is the last time you had the case open to clean it out? Right off the top of my head, you've got a power issue. If there is alot of dust and dirt in the power supply or in the case, clean it out first. Do the lights on the front of the case come on stay on?

Just based on what you've said it is, its a power issue. The machine is not getting power. Check the cord from the wall to the tower. Make sure it is plugged in good and check the condition of the cord. Try plugging it into another plug in the wall too. I've had that happen before. Let us know.

L

Most common failure in those is the power supply, I've replaced quite a few.

thanks to everybody!
the only thing i know is that i opened the case and took the memory stick out and put it back like it was before!
yeah there was a lot of dust. power supply stays on but cpu fan doesnt work blank screen.
thanks again.

You guys will love this, but someone told me that HP's Customer Service (Customer Service....Hah!) told them that static electricity can build up inside the power supply if they leave a machine on all the time by letting it go into that worthless sleep mode. This can cause the computer to not turn back on if they actually turn it off (what a concept) and they should leave it off unplugged for at least an hour and try to turn it on again.

Anyways, you tried reseating the memory to fix the problem, or you reseated the memory and now it won't come on?

i put a brand new power supply. Thermatake 410 W.
I cleaned the whole computer no dust. I still cant fix it. I unplugged the whole computer no effect. You guys are right about the customer service, its more like dis-service.
Any ideas are appreciated!
thanks.

If that's the case, something terminal has happened. Alot of times with older or OEM PSUs, they have no real protection in them so when they go, they can damage your system.

If the system fans come on at all, pull the CPU fan off and plug it into another fan header on the board to see if it comes on. If that fan quit working, your CPU may be shot if it overheated and the board has no thermal protection. Try that next.

The problem is, its so easy to point the finger at the PSU in these cases. I still think the PSU went and I can almost guarantee, it took everything else with it. But testing each piece of hardware will tell us.

All you have to do to is RESEAT your memory:

Open the case

Ground yourself

Pull out ONE memory module by pressing down on the tabs at each end.

Memory is keyed, meaning it only fits one way

Put it back in the SAME slot using constant pressure

If it seats correctly, the tabs you pushed down on in the first step will flip back up and lock into the memory chip in notches on each side of the chip

If you are trying to seat it incorrectly, the chip will not go all the way in and the tabs will not flip up.


Repeat the process for the rest of your memory chips.

I would advise doing this before buying a new computer.

Crashman, you've probably seen everything under the sun.

BTW, the shorted-out on-drive controller card is fairly common in HP and Compaq machines with Quantum drives, but I've seen it on a few Seagates too. Don't know what makes HP and Compaq so special