Left Pent4 on during power outage, power came on won't boot

October 16, 2013 at 10:30:47
Specs: Windows XP
No surge protector, can I fix... fuse? wire? re-install XP? (not computer savvy) I have an old pent3 can I scavenge?. Called Best Buy, they said min $200+ so better to buy new but short on cash.Note: Computer will not come on or indicator light on when on button is pressed but when power plug is inserted, cooling fans activate for 5sec then all goes dead.

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#1
October 16, 2013 at 10:56:07
It's difficult to troubleshoot when minimal info is provided, please post the make/model/model number of the computer. Pentium 4 is the type of processor & isn't very helpful other than to tell us your computer is old. If I had to guess, I'd say the power supply has failed. Are there any beeps before it shuts down?

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#2
October 16, 2013 at 11:19:28
Thank You! It is a HP Pavilion 700 w/XP Home Edition I will include the following though unsure of meaning: HW BOM:101 SW BOM NA24
System# MX20161612 When power cord is inserted fans come on with green light just above cord input also coming on, 2sec later beep (only one) then 3sec later all shuts off w/no light (tried holding front on button w/no result)

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#3
October 16, 2013 at 12:05:19
Did you also try unplugging from the domestic supply then holding the power button in for about 15 seconds?

Always pop back and let us know the outcome - thanks


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Related Solutions

#4
October 16, 2013 at 12:44:48
There is a fuse in the power supply but if it had blown you wouldn't get the few seconds of the fans spinning up.

But as already mentioned the power supply could still be bad, especially since you get the single beep which usually indicates the motherboard is OK. You could try temporarily removing all the add-on cards except video and disconnecting the drives just in case one of those is at fault. Do that with the power cord removed. Then reconnect the power cord and try to boot up. If it goes to the normal logo or posting screen then likely one of the disconnected items is at fault.

If it shuts down again then the best thing to try would be to swap in a known working compatible power supply and see if that fixes it.


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#5
October 16, 2013 at 13:16:58
Tried the 15sec disconnect but no good at 61 I do not understand or know how to disconnect (1) "Power Supply" (2) Add-on cards (Disconnecting the drives") Sorry but as stated, I'm just not Computer Literate so, thanks for the help but looks as if I'd best leave a sleeping dog lie!...Thanks Guys! :)

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#6
October 16, 2013 at 13:35:17
If I had to make a guess the most likely possibility is a failed power supply. Partly because of the symptoms and partly because of when it happened. Quite a lot of wires (plugs), so you might prefer to let a technician deal with it.

This gives an idea how to go about it:
http://www.dummies.com/how-to/conte...

Always pop back and let us know the outcome - thanks

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#7
October 16, 2013 at 15:00:33
"have an old pent3 can I scavenge"
might be able to use the power supply in that machine , to test the failed one, if its compatable.

larry


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#8
October 17, 2013 at 08:57:27
"It is a HP Pavilion 700"

700 is the generic series number, the actual model number is probably on a label on the backside of the case.

The power supply (aka PSU) is a box within the computer case. It converts the AC input into several different DC outputs. The main 3 voltage rails are +3.3v, +5v, & +12v. If any one of the 3 fail, the PSU has to be replaced.

http://tech.blorge.com/Structure:%2...


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