The HP Pavilion dv9000 series was introduced in 2006.

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Laptop shuts down after 1 second

When pressing the power button, the lights flash on and you hear the fan - but after a second, the computer shuts down. Then after 2 seconds starts the process over again. Once it is in this state, the only way of stopping it is by removing the battery and the power cord.

Update

Thanks. I sent the computer to HP and they replaced the motherboard.

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mark kantrowitz, just wondering if this was still an issue or if you got it resolved.

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mark all you have left is to accept your answer so that we all know that you got it fixed. Hope they did it under their warranty...Good Luck:)

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Sounds like the BIOS has been corrupted. This commonly happens after running HP's own "Health Check" and following its recommendation to update the BIOS. Things appear to work fine, but after the machine turns off, you are not able to restart it, and it exhibits the symptom you describe.

It is possible to re-flash the BIOS using a Phoenix Crisis Recovery Disk in an external USB drive, but it's time-consuming to find the right versions of PHLASH16, the BIOS files, etc.

I find it hard to believe that HP allows this extremely serious and well-known problem to persist, and does not provide any information on how to recover. They tell people to send the machine in to them to fix — at the users expense.

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im not to familiar with hp's but it sounds like there is a problem with your motherboard

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I would remove all the power from the computer, ac adapter and battery, hold the power button in for 30 seconds then reconnect it to see if that resets it. Would try removing the ram etc.. to see if something is causing it not to post. Some of the HP DV 9000 Models did have an issue with the Nvidia Graphics chip as well.

http://www.nvidiasettlement.com/affected...

Nvidia in a settlement is replacing certain units that experience video problems, not sure if you were having issues with that previously but it is worth looking into.

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have an HP dv9000, it although old it was expensive when I bought it. It shuts down and does not reboot. Messages say "no operating system". It then starts up after an hour of being shut off. So this sounds like a heat issue. The fan runs well it's not the problem. Even though it's an old laptop, it should work because it has the resources to run video and music. I will try a cooler. Nobody offer a definite answer very sad this machine has been retired only a year after original purchase.

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mark kantrowitz will be eternally grateful.
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