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HP rig

G

gwai lo

[H]ard|Gawd
Joined
Aug 31, 2004
Messages
1,690
So here it is....my dad's coworker has a problem with her HP, it doesn't turn on.

No flickering...no running anything...but mobo light goes on. The only clue, that I've seen, is that the green on the back of the power supply blinks whenever I plug in the power cable.

I've checked the power connections to the motherboard and checked all the other stuff...but nothing should be loose. As of now..nothing is. Soooooo.......hmm..double you tee eff.

I did notice that when I was reseating the ATX power cable, the green light on the PSU would go full green. Soo..hmm..something funky between the two. I'm leaning more towards PSU, but I haven't had time to swap out a working ATX psu and try it.

I figured I could google or something for an explanation to the green light, so I'd save time and energy. Thus far..I haven't found anything, search on this forum has nothing. HP's support turns up this . I'm hoping someone has run into this before and can give me some direction...I'll try HP support later, most of my experiences with tech support haven't been quick nor nearly as helpful as a forum.

No warranty left...soo =/

Really hoping the PSU isn't dead..cuz that probably means new case, psu, and mobo ><

Thanks in advance.

 
gwai lo said:
double you tee eff.
Click to expand...

lol

Yeah, sounds a lot like a psu problem. If the mobo was getting voltage (and assuming that the 24 pin port isn't totally fried), you should see at least the fans start up.

Try a different psu before you buy anything, but I'd put money on the psu being the problem.
 
What I suggest you do is get a voltmeter or better yet a multimeter and go ahead and check the leads of the PSU for the right voltage. Then go ahead and check the leads for OMH resistance and make sure that none of them are shorting to ground. You can usually pick up a cheap on a radio shack for around 15-25 dollars. The more expensive ones like a fluke are around 100-500 dollars. Everyone that fools around with electronic gear should have one :)
 
http://www.antec.com/us/productDetails.php?ProdID=77003

They sell these at Circuit City for ~$10 . I have one,and have used it with great success. Safe easy way to test a standard atx power supply, and the manual tells you which pins are Ground, +5, +12 and +3.3 volt. Keep in mind this is a 20-pin tester..

Used in conjunction with a basic volt meter you have quite an economical arsenal for safely testing psu's (safe, whereas simply shorting the pins to turn it on is not, as there is no load)

Also just curious, but if you end up needing to replace that hp motherboard, could you give me the part number. Through an unlikely event, i happen to have one that might end up working for you.
 
Yeah...this is one of the many situations I wish i had a voltmeter...guess I should just get unlazy and go get one.

r00k - model number is Pavilion a450n =)

thanks for the responses so far guys

 
as usual...what i didn't want to happen has happened

swapped out PSU and now i'm in the OS checking for spyware and viruses

soooo...anyone know where I can get a PSU that'll fit? :D



edit: hey look at that...HP's website has a "HP Parts" store...

nevermind
 
heh, the company i work for is an HP reseller. I suppose i could have mentioned that.. one thing i will say though is that place is darned expensive.
 
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