strange power-on problems

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coderanger

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Joined
Jan 16, 2003
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19
I would like to think of myself as being decently good with computers, but this is just baffiling me. I have a refurbished HP Pavillion xt963, all standard except for a new NIC card and 2 new 256M DIMMs, running RedHat Linux 8.0. One or two nights ago I was just working on it like normal and suddenly processer use jumped from my normal 30%-40%, up to 100%. At that point the system froze so I held down the power button for 7 seconds to do an emergency shutdown. I let it sit for a second, and then tried to power on, and nothing happened. I got behind it and checked the power cables, they were fine, but still nothing. The LED on the back of the power supply was on, an the NIC card was reading on the network as powered on, but not active, so there was power getting through the system. I then opened up the box and checked the power switch itself, its good, and then all of the systems power cables, also fine as far as I can tell. I then got the idea to check the CMOS batterey, which as I'm sure you can guess was normal, but as I was putting it back in the system suddenly turned on and seemed to work. I unpluuged it so I could put it back under my desk and reconnect the moniter, keyboard, ..., and when that was done the same problem was back. HP Tech Support has been basicly useless, os please just post any ideas you have, no matter how strange.

UPDATE--
I have been told that it sounds like a power supply issue, any one know how to check.

The full specs are:
1.2 GHz Pentium
512M RAM
40 GB HD
HP 8x CD Burner
Generic NIC card
Modem(don't know what kind, never used it)
Generic Floppy drive
 
Joined
Oct 3, 2002
Messages
27
I am not sure if this is a power supply issue or not, but you should be able to swap one out with no problem. You will just have to open the computer and check what the sables and specs are for the current power supply, run to the store and swap it.

In my experiance that is the easiest way to test. I think you could bring it back to the store if you needed to.
 

dvk01

Derek
Retired Moderator Retired Malware Specialist
Joined
Dec 14, 2002
Messages
56,452
Well if it worked when on the desk and not under the desk, it sounds like a cable fault, one of the cables or plugs prably has a dodgy connection

Put it all on top of the desk again, stretch out the cables and if it works then bend each cable in turn until you find the faulty one

otherwise unplug the keyboard, mouse etc in turn and see if it boots without them, one of them could be faulty.

check in bios if you have a stop boot with .....hardware and disable all so it will boot with faulty hardware and you can find the fault through device manager or whatever linux uses

Derek
 
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