Presario CQ5306UK power problem - not PSU

[Rocksuperstar]

Well, i say not PSU because i replaced it with a brand new 450 that i know works, and had the same result, or lack of result.  Just my luck that my warranty ran out literally a couple of weeks before it died, on boxing day.  Until then it had been a faithful little media server and after i upgraded the video card to an ATI Sapph HD5570, it coped with most games without too much complaining too.

If i plug in the power cable the light on the original PSU comes on, stays on and doesn't flash or anything, but the rest of the box is dead.  It has been suggested that it might require a specific psu, but the wiring appears to be the same going to the board connectors, and the power switch from the case appears to be sound as well (not the easiest thing to get to, is it?).

Sadly, amongst a deluge of bad luck, my multimeter has also fritzed, so i'm a bit up a particular creek and paddle-less, so any suggestions appreciated.

[Big_Dave]

Hi,

And what happens when the power switch is depressed?

BTW, would the referenced creek's name start with a "S"?

[Rocksuperstar]

Certainly would, you know the place?

When i bash the power switch nothing happens, literally. Not even a faint ping, no twitch from the fans, nowt.

[Big_Dave]

Hi,

Unplug the PC and hold down the power button for 1 minute. Plug the PC back in and give it a go.  Any luck?

Try clearing the CMOS and bios passwords as a precaution.  Any luck?

Try this procedure and see if you can isolate the issue. Trouble Shooting Power Supply Issues. Don’t skip any steps. Any luck?

Next locate the front panel header on the motherboard.  See the below image.

Review the front header pin outs for a typical HP motherboard.  Remove all the connectors and carefully lablel each one. If it so happends during your first inspection that a connector is loose or removed that may be your issue.  Review the below image for a pin out reference.

Now try shorting (touching) pins 6 and together with a screwdriver.  Any luck?

_____________________________________________________________________

I have a place upwind from that creek and I love to watch people trying to get their canoes upstream with no paddle.

[Rocksuperstar]

Sorry, in the UK, so figured i'd try when it was light.

Button held for one minute, plugged it all back in - nothing.

Cleared CMOS & BIOS - nothing.

Troubleshooting always tells me to order a replacement PSU, but i'm not convinced that there's anything wrong with this one, as i've just five minutes ago taken it from the presario and tried it out in another old desktop case, and it has no problem spinning up the fans on that.

The front panel connector is a single block in this box, but all pins are good and shorting 6 & 8 gave me no joy either.

Board fault?

[Big_Dave]

Hi,

What is the make and model of the power supply?

[Rocksuperstar]

The original one or the replacement one's i've tried?

Stock PSU is a Liteon (HP p/n: 585007-001) but i've also tried an Akasa "eco-friendly" one (apologies, appears to be a 400, thought it was more) and a big ol' HEC 550w (model HEC-550TD-PTE), all produce the same lack of results.

All three spin up the fans in this old spare case, but nothing in the Presario.

[Rocksuperstar]

Sorry, hate bumping for bumpings sake, but if anyone has any other suggestions, i am of the opinion that all three of these PSU's are in fact good, and that the fault might lay somewhere else, such as the board. Problem i have have is i can't be sure and i don't have disposable cash, so was hoping there was a way of diagnosing it more definitely before i go off looking for replacements. Ta muchly.

[Rocksuperstar]

Guess that's a no then... well cheers for trying anyway. If anyone else has any suggestions, fire away.

I've just emailed Foxconn, the company who manufacture the board to see if there's any kind of warranty on that, separate from the compaq one but they appear to solely trade out of China (worked with my telly when it broke outside of it's warranty, so worth a crack i guess).

In the meantime, anyone has a brainwave then go for it, all appreciated.

[CherylG]

I would proably try removing the added video card first-have seen a bad card cause no power on. If no joy and you have plenty of time, try unhooking cables to CD/DVD drive, hdd one at a time to see if a bad component is causing the failure. Pull the memory stcks out, it won't boot without them but if you get a complaining beep you know the motherboard is alive.