HP Pavilion 8140 Power Supply

[Searching]

I am working on an HP Pavilion 8140 for a friend. I have little to go (owner has no documentation and no clue). I tried to power up, but the power light just flickered and a POST card I put in a PCI slot does the same (no code registers). The Power Supply fan slowly rocks forward and back and a second power supply barely rotates. No POST; no devices activate. I replaced the power supply with a know good Power supply and heard 2 beeps. The HDD activated but no Video, and no lights on CD-ROM or Floppy.
The HP Power supply has a connector that I have never seen on a power supply. It is a 3 wire connector (2 black and 1 purple) that plugs into the motherboard. This may be why the peripherals will not function. or the mobo may have gone with the Power supply. I can't find any documentation on the HP mobo or power supply.
Also, I can not figure out what BIOS it is using. HP sight talks about BIOS but never names which one it is using. The BIOS chip has "Atmel" on it. Never heard of it.
Can anyone give me some insight?

 

[edfair]

Original power supply was crowbaring. Coming up then the protection feature was kicking in. And the PS was probably bad.
Suspect that the connector is a remote on switch that ties back to the power on switch. But this is only guess until a HP help desk person logs in and sees the question. Ed Fair
efair@atlnet.com

Any advice I give is my best judgement based on my interpretation of the facts you supply.

Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.

 

[Guest_imported]

Hi,

I am having the same problem with my HP Pavilion 8140. I wanted to use a standard ATX power supply to replace the HP one, but it sounds like it may not work.

Have you found any more infomration on the extra leads or have you found a solution to the problem?

 

[Karl Blessing]

I had the same problem on an old home-build dual pentium Pro 200Mhtz, basically it appears two types of PSU do this.

Cheap generic PSU after a period of time
and Old ones.

I Would just recomend replacing the PSU for a cleaner more powerful one, like one of the Sparkle brands, since they only cost about 40$ for a good 300Watt. Karl Blessing aka kb244{fastHACK}

 

[Searching]

I finally found the solution. A friend hooked me up with a parts supplier, "

http://www.preowned.com"

800-274-5343, that had exactly what I needed. Although this power supply did not appear in any of the searches I did, it did show up at the above mentioned site. It was the exact same part. The power supply was $55.00 ($79-$24 for the return of your old power supply). Of course you need to pay them $4.98 for shipping, and you have to ship your power supply back to them, but at least you know all the connections will be the same.
Another quirk that you may encounter with this computer is that it may have on-board video but be using an accelorator card as well. You need to plug directly into the on-board video or use a connector from the female on-board video to the male accelorator card and from the female accelorator to the monitor. (you can tell an accelorator card by the male and female 15-pin, three row connection)
Thank you all for your input.