Pavilion A1507UK does not start until left and turned on for at least 5 minutes before trying again.

Sorry if this is a long post on a stupid problem but it baffled me completely. It started a few weeks ago, that is to say not start when turned on first, but start normally have been left at least 5 minutes.

My first thought was that the hard drive may be failing, so I bought a new one (same model) and cloned the original using Seagate DiskWizard. The swapped and the fault was still there.

Then the food. Bought another (identical) and them inverted. No difference, still don't need warm up before boooting. Both power supplies tested A1 on a multimeter.

OK, so it must be the motherboard. Bought another (identical ECS RC - 410M rev 1.03) a Pentium 4 CPU and new radiator and fan to go with it. Swapped their course and other BIOS of Compaq and not HP, cela worked perfectly, in addition to having to be put on for 5 minutes before you start...!

Tried original power with the new motherboard - started immediately when first in market but the next morning - no change. Pointing to the motherboard (being hot when we food supplies changed) again.

The only thing I haven't changed is the memory and the on/off switch (I tried fill the pins on the map and the fault was still there), but that passes all the tests I can throw at it.

Then I read about the bad capacitors. Found 2 those inflated in the region on the original Pavilion on board voltage regulator and was able to change them for 2 new hats of Nichicon, thinking it was the answer. It wasn't. Return all right, swapped boards is dory hunky apart from the refusal of this computer to start when the first step. Also I can't find a single capacitor bad look on the Compaq Board that shows the same characteristic.

I am now at the stage that I think that someone else must have met this problem if I now get with almost 2 completely different computers. There must be something really stupid that I didn't think or an amazing series of coincidences if all these bits are bad.

Help someone?

Eyemdee, have you tested the memory.  I had almost the same problem when I built my last computer.  Finally, it came down to memory.  I replaced it and everything was fine.  As I said, I would test it before buying more, however.

If your problem is solved, please click "accept as a Solution.

Tags: HP Desktops

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