06-04-2005 06:38 AM
I have a Pavillion A400N, the power went out yesterday evening and now the computer won't boot up.
The power button just flashes (and the green light on the power supply on back of desktop flashes too). Holding the power button in for 5+ secs does nothing, F1 or F10 when I turn the power back on does nothing. Is there a reset button on the PS, how do I test the PS to see if it's bad?
When the monitor is turned on it says "Warning, PC is entering power saving mode" then goes black.
06-05-2005 05:10 AM
To troubleshoot this issue, I recommend you to try clearing the CMOS:
* Turn off the computer and disconnect the computer from wall socket.
* Open the case of the tower.
* Locate the coin shaped battery.
* Detach the battery from the computer, and reattach battery back to the computer.
* Turn on the computer.
06-05-2005 06:07 AM
I tried that yesterday. I removed the battery for about 20 mins, replaced it and plugged it back in... same result as before.
I noticed the fans don't come on either. I'm thinking it's the PS?
HP tried to get me into BIOS by pressig F1 on startup, but no luck.
Any other ideas?
06-05-2005 07:28 AM
If a power supply is the cause of an operational or system boot issue, use the steps in the following HP Web site to determine if the power supply is defective. Many suspected power supply problems are caused by something other than a power supply failure.
06-19-2006 08:08 AM
05-30-2007 01:28 AM
05-30-2007 02:19 AM
I was able to fix this problem by changing the Power Supply. I ordered the power supply from HP and the computer has been running great ever since.
01-12-2008 10:34 PM
I noted that someone found some power supply statistics in a forum at Tom's hardware that even the best power supplies seem to have a failure rate of 1/100 and Antec had up to a 9% failure rate...that is terrible. My HP a430n power supply also died, an Astec? 250W unit that I replaced with a 500W Coolermaster which has too noisy of a fan compared to the new Aerocool zerodba unit.