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No power to the computer - Motherboards

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  • James Calvert Dec 07, 2008

    still no joy im afraid

  • casper_32845 May 09, 2009

    PC will not start up the only sign of life is the fan spinning continuously

  • Anonymous May 21, 2009

    Same issues - no power other than intermittantly whirring fans, flickering leds; have replaced PSU & checked front panel wiring etc. Diode issue on mainboard?



    EP-8HMMI-A.

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  • 2,110 Answers

Check first UPS then SMPS power supply...

Posted on Dec 07, 2008


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My computer not powering up and the power supply is good because I tested it another computer. Can you please help me.


  1. Verify that the power supply voltage switch is set correctly. If the input voltage for the power supply does not match the correct setting for your country, your computer may not power on at all.
  2. Check for disconnected computer power cable connections. A loose or unplugged power cable is one of the top reasons why a computer doesn't turn on.
  3. Replace the computer's power cable. This is the power cable that runs between the computer case and the power source.
    A bad power cable isn't a common cause of a computer not receiving power but it does happen and is very easy to test for. You can use the one that's powering your monitor (as long as it seems to be getting power), one from another computer, or a new one.
  4. Perform a "lamp test" to verify power is being provided from the wall. Your computer isn't going to turn on if it's not getting power so you need to make sure that the power source is working properly ,.

Sep 13, 2013 | Biostar MCP6P M2+ 6.x Motherboard

1 Answer

Gateway DX4822-01 power switch problems


The front of your computer is the Front Panel.

The area of contact pins on the motherboard, that the Main wires from the Front Panel go to, is the Front Panel header.

Main wires such as Power On LED, Power On switch, HarDDrive activity LED, and Reset switch; IF used.

Suggest KEEP track of where those wires go!

Make a drawing, and notes. I even use a magic marker, (Sharpee?), and make a notation of the Front Panel header pinout, on the floor of the computer case.

In this particular case it isn't known if the Power On switch is the problem, or the Power Supply.

Power On switch;
Power UNPLUGGED to computer, Anti-Static Precautions FOLLOWED; (Don't know? Post back in a Comment),

Remove the twisted pair of W/B and W/G wires, to the Power On switch pins, in the Front Panel header.

Plug power back into computer.
Use a small flat tipped screwdriver, and touch the two Power On switch pins. (Jewelers screwdriver works well for this application)

Power Supply comes on? Bad Power On switch.
Allow Windows to fully load, run for a few minutes; then turn the computer off normally.

Jump the two Power On switch pins again.
Power Supply comes on? You DEFINITELY have a bad Power On switch.

Power Supply does NOT come on?
We will go to a further diagnostic test then.
Awaiting results for first test, then we will go on.

Post back in a Comment.

Regards,
joecoolvette

[Also; is the computer dirty inside? ]

Feb 19, 2013 | Acer Motherboards

1 Answer

My computer will not power on


Check if the fan in back of the computer is running with the power switch of the computer on. If you turn the power switch on and nothing happen then most likely the power unit is not working and your computer is dead. If the power unit is working you may have a bad motherboard.

Mar 25, 2012 | Motherboards

1 Answer

I have a ASUS P8P67 LE motherboard, intel i5 - 2310 processor, kingston DDR3 RAM and ASUS ENGTX560 DC/2DI/1GD5 graphic card. When I turn on the PC i get one long and then three short beeps, and the...


> one long and three short BEEP

Something is wrong with some of your hardware.

Turn the computer off.
Disconnect the AC power.
Remove the graphic card.
Connect the AC power.
Turn the computer on, to see if the pattern of BEEP has changed.

Turn the computer off.
Disconnect the AC power.
Remove the RAM -- all of it.
Connect the AC power.
Turn the computer on, to see if the pattern of BEEP has changed.

Turn the computer off.
Disconnect the AC power.
Reinsert one stick of RAM.
Connect the AC power.
Turn the computer on, to see if the pattern of BEEP has changed.

Turn the computer off.
Disconnect the AC power.
Reinsert the graphic card.
Connect the AC power.
Turn the computer on, to see if the pattern of BEEP has changed.

Jul 16, 2011 | ASUS P8P67 LE LGA 1155 P67 SATA 6 Gbps and...

4 Answers

Computer powers on but then turns off after a few seconds


I know this is a late response but someone might have this similar issue which is generally caused by a faulty power switch on the case of the computer. The switch is stuck in the pressed or active position so when you power the computer the switch still being depressed or faulty turns the computer right back off again and you're stuck in this loop. The best way to identify if this is the issue is to remove the power shunt from the jumper then use a screw driver to jump the power connections that would turn the computer on... if it stays on the switch or entire case needs to be replaced whichever is easier

Aug 08, 2008 | ASUS P5W DH Deluxe Motherboard

6 Answers

Asus P4sgx-mx


Issue: No power or computer does not turn on.
Cause: No power from the computer can be caused by any of the below possibilities.
  1. Connections not connected properly.
  2. Third-party hardware.
  3. Bad power cable.
  4. Incorrect power supply.
  5. Bad battery.
  6. Bad power supply, power button, and/or power board or inverter.
Solution: Note: If the computer is turning on but is not (beeping) or giving any type of picture on the display. If you are uncertain if the computer is turning on or not, this can be easily checked by locating any fans in the computer or visible from the outside of the computer. If these fans are spinning, the computer is receiving power and this document may not apply to your issue. Connections not connected properly Verify that the power connection is connected properly to the wall and the back of the computer. If the connections appear to be connected properly, attempt to disconnect and reconnection both ends of the cable. If you have a power strip (surge protector) or switch used to turn everything on at once, temporarily disconnect the computer from that switch and connect that cable directly to the wall. This will help verify that the strip or switch is not bad. Verify that the outlet works by connecting a different component to that switch. Third-party hardware : (If )additional hardware has been recently added to the computer it is recommend that you temporarily disconnect that device or devices from the computer to verify they are not preventing your computer from turning on. Bad Power cable : Verify that the cable supplying your computer is not bad or damaged by using another power cable. If you have a standard crt modem this cable can be used in place of the computer power cable. If you have a portable computer or laptop, when the cables are plugged into the laptop you should see a power light or battery charge light. If this light is seen, this is a good indication that the power cable is good. Incorrect power supply If you are building your own computer or if the computer has never turned on since you purchased it, it is possible you are using a power supply that does not supply enough power and/or the incorrect type of power supply. Verify your power supply meets the requirements of your motherboard and processor. Bad battery If your computer is a laptop or portable computer that utilizes a battery for mobility it is possible that the battery may be causing your issue.
  • If your computer powers on when the cable is connected to the portable computer but not when it is disconnected, we recommend you purchase a new battery.
  • If your computer does not power on when the battery is connected and when the power cable / charger cable is connected, try removing the battery and seeing if the computer can power on with only the power cable connected. If no power is still received, skip to the final section.
Bad Power Supply, power button, and/or power board or inverter If, after following the above sections, your computer still receives no power, it is likely that a hardware component in the computer has failed. It is most likely that the power supply has failed. If you do not plan on replacing the power supply yourself or if you have a portable computer, we recommend having the computer serviced by your computer manufacturer or a local computer repair shop. If you have a desktop computer and plan on trying to repair the computer yourself, we recommend you replace the components in your computer in the below order.
  1. First open the computer and verify the power connections. You may also wish to consider disconnecting the main power cable and reconnecting the power cable to make sure it has not become loose. Also verify the power button cable is correctly connected to the Motherboard.
  2. Replace the power supply with a new power supply.
  3. Replace the motherboard.
Hope this helps ya/Please dont for get to Vote.Thank You

Jul 19, 2008 | ASUS P4SGX-MX Motherboard

3 Answers

Loss of power


hi

if you replaced the psu itself and you still get no power, have you tried changing the power cable itself?

Jan 23, 2008 | Gigabyte GA-8PE800 PRO Motherboard

1 Answer

Power down


Windows does not shut down. Additional information and causes that may cause Windows 95 or Windows 98 to freeze, hang or lockup when attempting to shut down the computer.


How to restart or shutdown the computer in DOS. If you are currently in DOS and need to turn off the computer press the power button. Note: some newer computers may not allow the computer to be shut down ...


Installing a pc computer power supply Write down important information from the top or bottom of the power supply such as the Model Number, Serial Number and specifications (such as voltage...).


Basic floppy disk drive troubleshooting Power down, unplug, and open computer, being aware of ESD and its potential dangers. Verify that the floppy connection is connected to the motherboard FDD .

Good Luck, Read and follow instructions/Please dont for get to Vote/Thank You.

Dec 23, 2007 | Intel Motherboard

2 Answers

Power issues


Was one of the tips on the HP site to unplug your Video Card?
The power supply might be having trouble pumping enough power into the card.
After you take out the card and get it to POST, go into the BIOS and turn on the onboard graphics and see if you can get it back to the OS screen.
If that doesnt work post again and ill try to help you further.

Nov 29, 2007 | Intel Motherboard

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