Question about System Power Supplies

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Problem with power

My computer turn off itself

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  • brian c
    brian c May 11, 2010

    Please be more specific?

    How long does the unit stay on before shutting itself off?

    If you just boot it up, and not open any programs, does it stay on? or only shuts down when under a load?


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  • 165 Answers

Open Control-Panel, Power-Options. Make sure system standby and hibernate are set to "Never" (for XP) similar in vista.

Posted on Jun 08, 2008

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1 Answer

Psu wont turn on


Test the PSU. Unplug it from the motherboard and then with nothing connected, short the green wire to any ground (usually a black) using a paperclip and it should come on and stay on if the problem was with the motherboard/computer but if it shuts down, then you know the problem is the PSU itself.

If the PSU stays on under no load, then one possibility is you had too much connected to it and it shut down as a protective feature. The Bios would not beep if the PSU is shutting itself down. Also make sure you have the internal speaker connected. It's possible you just can't hear the beep because there is no speaker connected or it may be connected to the wrong place.

Don't throw away a defective power supply. It is worth a couple bucks as parts for an electronics enthusiast. Keep it out of the landfill.

Jan 16, 2013 | RaidMax System Power Supplies

1 Answer

Which two connections supply the power from the battery


Hi Ray,

In a computer, nothing connects directly to the battery, as the battery is not what powers the system. The battery controls the CMOS settings, which involves all of the things that come up before windows loads when you turn on your computer.

As for how the computer actually gets the power, there's a box in there called a power supply, which receives its power from the 3 pronged plug you put into the back of it. The Power Supply gives power to the computer through a series of different wires.

There are a bunch of 4 pin molex connectors, that go from the PSU (power supply unit) to the various drives throughout the machine. In addition, it supplies power to the motherboard itself via a 20 or 24 pin connector, that goes straight into the board. Some have an additional 4 pin one as well to supply power to the processor.

If you were looking for something else, feel free to leave a comment.

Hope this helps :)

Nov 29, 2009 | Packard Bell System Power Supplies

1 Answer

Dell computer was working and i turned it on next day and it was dead no lights or noyhing


If your computer is under warranty, I'd suggest you contact either the Vendor where you bought it, or the Dell support site. Either should be able to acquire a new power supply and install it for you free of charge (if under warranty).

Some other thoughts though, before you do that. If there are no indicators that your power supply has died (smell burnt electronics, any weird buzzing sound prior to the computer not working, etceteras), then you might want to check the connections to the wall socket, the connection to the PSU itself, and even test the circuit breaker for your socket (some wall sockets have test / reset buttons that cut the power during surges).

-Jon

Sep 26, 2009 | Dell POWER SUPPLY Power Supply

1 Answer

Just Plain stopped working


I'll assume you've already checked the obvious possibility that the outlet the computer is plugged into is not working.

Here's a diagram of the main power plug from the supply:
b66d358.jpg
With a short wire (like a bent paperclip), short the green wire PS_ON to the ground pin on either side of it (in the same row, not directly across in the plug!!). The power supply should start up if it's working properly. If the supply doesn't come on, replace it. If it does, then you'll need to replace the main board.

That's the way electronic components usually fail. The initial surge when you turn something on causes a part that was ready to fail to go bad, the same way a light bulb usually burns out when you turn the light on, and not while it's already lit. So the computer was working fine, then the next time you turn it on....pffft!

Mar 30, 2009 | Ultra 500Watt ATX Power Supply with 2-80mm...

1 Answer

Computer Won't Power Up


If the blinking amber LED is on the computer itself and not the monitor, this is most likely a power supply issue. First thing to try would be replace the power supply. If the blinking led is on the monitor, it probably has bad capacitors and needs to be replaced. (or repaired)

Jul 15, 2008 | Dell Dimension 8400 power supply ** FREE...

2 Answers

Computer reboots


Hi cool,

Is your Computer keeps on recycling from booting and never finish to load your OS?

As far as i know you got a problem with you CPU, your computer processor is overheating inside that's why it keeps your PC recycling it's power.

Try to go to the BIOS setup menu, and go to the cpu temperature and you will that your PC is heating up.

Hope it helps & give you an exact reason.

Enjoy.


tnx
-micro

Feb 10, 2008 | System Power Supplies

2 Answers

Power up problem


Your laptop needs a new battery. Buy a new one and have it replaced by a service technician for free.

Sep 15, 2007 | System Power Supplies

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