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Unable to turn off pc without disconnecting power supply

L

Lacit

Junior Member
I returned to find a blank monitor and the HDD light on the front of my PC blinking sporadically. Also no period of pressing or holding the power button would turn off or restart the system. I ended up having to unplug the power supply to shut it down. Whenever I plug the power supply in again I am met with the same issue. No screen a continuously blinking HDD light and the inability to turn off or restart using the power button. Case, Video Card, and Heat sink fans are still being powered/operating.

New components I have added in the past 3 months are:

-Kingston 512mb ram
-Gecube ATI Radeon 9250 PCI
-Western Digital 160gb HDD


So far I have tried this and started system up again:

-Removing new ram installed. (Same results)
-Disconnecting IDE cables to optical devices and FDD (Same results)
-Disconnecting power and IDE cables to Hard Drives (Same results)


Additional information that may be useful is that for the past month at least once every week to two weeks my computer would make a single beep. I took this as nothing since this was not during start up and felt it did not signify anything. Also for the past month about once a week my monitor would go blank for a second then return back to the desktop.

Emachine T2385:

Phoneix Bios (I think)
Bestec 250 watt power supply
Gecube 9250 ATI Radeon
Western Digital 160 HDD
Western Digital 80 HDD
Kingston 512 ram
Crucial 512 ram
P4 Northwood Celeron 2.30
 
Leave the unnecessary stuff unplugged (HDD, floppy, optical drives, PCI cards)

Clear the CMOS & try to boot

Might check that the CMOS battery is good

Look for bulging caps on the mobo

Anyway anything fell behind the mobo and it's shorting to the case?

I gotta hunch your mobo is toast.

Good Luck with it,

Fern
 
I would reseat all of your memory and try booting with just 1 stick and reseat your video card. I also wonder if your power supply is undersized for your system.
 
About an hour ago I reconnected the power supply and the power supply fan was not working. I disconnected and reconnected again and the PS fan is spinning at a very slow revolution in between starting and stopping. I also noticed the HDD light flickers with the revolution of the power supply fan. It seems as if the power supply is on its last leg.

When I get back I will follow the rest of your directions Fern. I have already taken out all components and cleaned out my case, reseated all connections and checked thoroughly that their was no loose items that would short out the motherboard. After the check I did an hour ago I am beginning to suspect it is the power supply as amdskip has mentioned.
 
I thought about saying something about your PSU, just I've never seen a faulty one prevent a PC from turning off. (So if that's it, post back and tell us please)

However, given your observations about the PSU (slow fan etc), first thing is have it checked, try another whatever (b4 bothering with my suggestions). I"m thinking it's old, I haven't seen a 250 watt in a long time 🙂

Fern
 
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