PSU for an HP pavilion 7965 !!!

Hewlett-packard / Pavilion 7965
January 12, 2009 at 15:33:11
Specs: XP Home, 512 ??
Good Evening. A friend of mine gave me a machine to look at for one of his friends. It doesn't power up at all right now. I just got it home and haven't done any diagnostics on it yet, but from what I was told, it sounds like the PSU. Can any of you electronics savvy people give me a suggestion as to what PSU to try. From what I read, it's a 200 watt. I haven't physically torn it apart yet, so I can't verify that. Here are the system specs from HP http://h10025.www1.hp.com/ewfrf/wc/... I know Jam is the electronics guru on here, so I hope to hear from someone soon. TIA

Grasshopper

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#1
January 12, 2009 at 18:50:29
definitely sounds like a bad PSU. i would try same wattage. if same problem, it could be the wattage is too low. or it could be a bad circuit on the motherboard. but definitely sounds like a bad PSU.

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#2
January 13, 2009 at 06:27:22
The 1st thing you gotta do is open it up & have a look. Blow out all the dust (do NOT vacuum) & check all the connections. If there's no signs of life, test the PSU. Start by unplugging both the 20-pin main ATX plug & the 4-pin ATX12V plug. Take the 20-pin plug & using a short piece of wire bent in a U-shape, stick one end in the pin corresponding to the green wire & the other end in any pin with a black wire...now plug in the PSU & see if the fans spins up. If it doesn't, the PSU is most likely dead. Before running out & buying a new PSU, do you have one you can temporarily try to see if the system will boot? If it does & you need a replacement, there's no reason to stick with 200W. I wouldn't go with anything less than 250W. And just in case you don't know, the PSU will only produce as much power as the system needs. For example, if you installed a 1000W PSU & the system only requires 180W, it wouldn't sit there churning out 1000W...it would only produce 180W.

Here's a couple of possibilities:

http://www.newegg.com/Product/Produ...

http://www.newegg.com/Product/Produ...

P.S. There are cheaper units available that would work, but when you factor in the shipping, the above (which ship for free) are better deals.


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#3
January 13, 2009 at 08:49:10
Hey Jam and ghrarkfyrebyrd, Thanx for the reply. The PSU was dead. I didn't have one to test it with anyhow. This is a kid with very little money, so I found a replacement 250 Watt and ordered it for him. The original was a 200 Watt. Thanx for the suggestions, I appreciate it.

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#4
January 13, 2009 at 11:38:34
If you work of PC's, even if just as a hobby, you should have at least on PSU on hand that you can use for troubleshooting purposes. Many times when a PSU blows, it takes out other components along with it...CPU, motherboard, etc. That's why you should always troubleshoot rather than just randomly replacing parts. Right now, you have no idea what's wrong with your friend's PC. If you're lucky, it's just the PSU. Also if you're lucky, the 250W replacement unit is a good one. The two I linked to are only $30 & they are both decent PSU's. How much did you pay? $15-20 for "el generico"? I don't know where you live but several of the PC shops in my area sell used 250-300W PSUs for about $5 each.

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#5
January 13, 2009 at 12:53:43
Hi Jam,

Thanx for the advice. I have worked on a few machines over the years. I would say my experience is limited but learning. I read your post after I ordered a new psu. The company I bought it from has a good return policy. No restocking fee and no hassles. I wish I would have read your post first, but I didn't. Here's the one I bought http://www.911forpcs.com/bestecatx1... If you think it's crap, maybe I can cancel it. If not I can always return it. I hate to just replace parts randomly too. I understood before I ordered it that it could be something else and don't know all the circumstances behind the failure. All I know is that the kid's father said he went to turn it on one day and it was dead. I did a pretty thorough check before I ordered a new psu. Tried new cords, check the switch on the psu. etc. I live in eastern PA near Allentown. We have a few shops around here, so I'll check with them first in the future. Thanx for the time you've taken to advise me.

Grasshopper

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