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Thread ID: 90691 2008-06-13 01:07:00 Power cut stopped my pc, PS shot? Strommer (42) Press F1
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677992 2008-06-13 01:07:00 I have removed the leads from the power supply to the mb and other bits inside the case. 240 v to the power lead: ok. I get 5 volts (5vsb) on one of the wires of the 20 pin plug going to the mb, and I get 60 millivolts on one of the wires of the 4 pin plug to the mb. No other voltage detected on my multimeter but I wonder if the ps does not get fully activated until it is switched on from the button on the front of the case?

PS: Hyena DR-B300ATX.

PC specs: P4 at 3 Ghz, ASUS mb, nearly 5 years old.

The power cut lasted for 20 minutes in some parts of our town but there was only a flicker at my house. I was using the pc at the time and it went dead at the same time as the power flicker. Fax machine beeped and lights flicked. I have two surge protectors to the pc, connected in series - I needed extra power points and it seemed a good idea at the time to connect the two surge protectors together; they still deliver 240 v and their red lights are still on - I cannot recall if the red lights indicate that the surge protectors are OK or if they are shot.

Do I need to replace the ps? How can I tell if the ps is dead? Cannot see or smell anything wrong with the ps. The PC is dead, nothing goes at all. 		Strommer (42)
677993 2008-06-13 01:15:00 I would use something better than 300W for a P4 3 ghz Speedy Gonzales (78)
677994 2008-06-13 01:18:00 First Comment is Hyena is pretty much the worst PSU on the market.


Swapping in another PSU confirms or eliminates.

If you are a little more technical minded, disconnect all power leads to the PC mobo hdd etc. On the PSU power connector to the motherboard, use a small wire to jump the green pin to any black ground pin. If the PSU does not start then its a dead PSU.

PS, a "true" 300watt may be perfectly fine for a P4, depends what you have in the rig 		Battleneter2 (9361)
677995 2008-06-13 01:19:00 Yep, Battleneter has the right idea. That PSU is a heap of crap too, good opportunity to upgrade. wratterus (105)
677996 2008-06-13 01:47:00 Hyena DR-B300ATX.

Do I need to replace the psu?
You sure do. Seriously bad reputation, even if it wasn't dead I'd throw as far as I could. 		pctek (84)
677997 2008-06-13 02:34:00 On the PSU power connector to the motherboard, use a small wire to jump the green pin to any black ground pin. If the PSU does not start then its a dead PSU.



:yuck: Hyena - yeah, I KNEW it would be trashed here - I recall another thread last year that rubbished Hyena PSUs.

If I need a new PSU, I'll be up for suggestions. I run a DVD drive plus a CD drive. There is still a floppy drive but I don't use it anymore. Have two HD's. Not a gamer. Have a 128 mb Radeon graphics card. I never did like the Hyena because it made too much noise while running so it would be nice to get a quiet PSU, and I wonder if any have a built in surge protector?

If it turns out that I need a new MB, then its a whole new ballgame. Might consider a basic upgrade box but would like to use the current 120 and 80 Gb HD's. But I am getting ahead of myself.... its probably just the PSU.

OK, I found the green wire and the blurb on the PS confirms that it is the ON lead. Gotta run now but will jump it to a black pin (or why not the metal case?) and see if the PSU starts. Back in an hour or so.

Thanks everyone! 		Strommer (42)
677998 2008-06-13 03:11:00 Hyena.....LOL..hahahahahahahah!

Everytime someone buys a Hyena PSU, the supplier cackle...hehe

Sorry mate....nuf said 		SolMiester (139)
677999 2008-06-13 04:01:00 If you are a little more technical minded, disconnect all power leads to the PC mobo hdd etc. On the PSU power connector to the motherboard, use a small wire to jump the green pin to any black ground pin. If the PSU does not start then its a dead PSU.


THE PSU STARTS - jumped the green to a black as you said. Using the multimeter I now get 12, 5 and 3.3 voltages on various pins.

Bugger. Was hoping it was just a blown PSU.

Now what do I do? 		Strommer (42)
678000 2008-06-13 04:21:00 Bugger, I was too. ;)

I'd try plugging it in again, resetting the BIOS and seeing if the PC powers on.

Also unplug everything unnecessary from the mobo (cd drives, hdds, card readers, etc) and try again, as a power surge can sometimes damage those components and cause them to prevent the PC powering on.

if it still doesn't go, mobos dead, but I wouldn't be sure of that without trying another PSU anyway. 		wratterus (105)
678001 2008-06-13 04:35:00 Bugger, I was too. ;)

I'd try plugging it in again, resetting the BIOS and seeing if the PC powers on.

Also unplug everything unnecessary from the mobo (cd drives, hdds, card readers, etc) and try again, as a power surge can sometimes damage those components and cause them to prevent the PC powering on.

if it still doesn't go, mobos dead, but I wouldn't be sure of that without trying another PSU anyway.

OK I kept everything unplugged but connected the 4 pin and the 20 pin leads to the mobo. PSU now works. After a few seconds I heard the usual beep a pc makes when starting up.

I can keep it connected and take it to my desk and connect the monitor - to reset the BIOS (not sure how to do this) - is this what you mean?

Or should I simply cut the power and then reconnect... but what?

[Edit]

I connected the monitor and it says: "Reboot and select proper boot device." 		Strommer (42)
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