Question about Dell Dimension 2400 PC Desktop

3 Answers

NO LED LIGHTS COME ON WHEN THE POWER BUTTON IS PRESSED

The computer makes no sound and does not power up. The outlet and
power cord have been checked and the CMOS battery has been replaced.
Could it be the power switch or the power unit? Please reply. Thank you.

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If there aren't any lights and the fans do not spin up,it is definetly the power supply. Unplug the Ac from the back of the computer.
Then take the power connector from the power supply off of the motherboard. wait 30 secs. then plug it back into the motherboard. Plug the AC back into the PC and power it up. If this does not work then it is the PSU.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

Posted on Nov 28, 2008

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Yes it possibly is ur power supply unit u can usaly pick one up cheap at a local used computer shop

Posted on Nov 28, 2008

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Make sure that theres power on the motherboard by checking on the flea light on the board,if its off,it could be the power supply has gone bad or the mother board itself

Posted on Nov 28, 2008

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2 Answers

When i turn the computer on theres no picture no sound and pretty sure its not powering anything on


Hi there,
please check if you can see any light or LED display when you press the power button.
If none. Check if the power cable is tight on the back of the computer and check if it's plugged into a power outlet.
You can also try plugging it into a different power outlet just to make sure it's not the Power outlet that has a problem.
You can also try to switch the power cables.
Hope this works, if it doesn't you will have to tear down the parts of the computer to check where the fault is coming from.

Jun 01, 2011 | HP Hewlett Packard Pavilion Slimline...

1 Answer

Will not turn on when power button is Dell Inspiron 518 will not turn on when power button is pressed. Green LED on back of powersupply lights and orange LED on motherboard turns on. No fan operation on...


Green LED on back of power supply indicates it's getting power. That does not mean that it's distributing the power voltages to the computer. You could have a bad power supply or a bad motherboard. Just to make surethat nothing else is causing the problem, remove any PCI cards like modem,video card, sound card, etc... Remove the memory modules and disconnect cablesto CD/DVD drives. Look at the USB ports to see if any are damaged.

Apr 13, 2011 | Dell Inspiron 518 Desktop Computer

1 Answer

I have a hp officejet 7410 it keeps losing connection with wireless router, I need to do a hard reset to factory out of box condition, starting from scratch seems the only way to get it back on line,...


May be you can try to perform partial reset by :
  1. Disconnect the power cord from the back of the product, and then wait for 20 seconds.
  2. Press and hold # and 3 on the product control panel while connecting the power cord to the back of the product.
  3. Release the buttons when the product turns on. The reset is complete..

Step one: Reset the power module The power module has a safety feature inside that protects the product during a power surge. If you experienced a recent power surge, the power module might need to be reset. Use the following steps to reset the power module.
  1. Unplug the power supply from the rear of the product.
  2. Unplug the power cord from the electrical outlet, power strip, or surge protector.
  3. If the product uses a power module with a detachable power cord, disconnect the cord from the power module.
  4. Wait 15 seconds.
  5. Reconnect the power cord to the power module.
  6. Plug the power cord back into the electrical outlet. Do not use a power strip or surge protector.
  7. Check to see if the power module has an LED.
    • If the power module does not have an LED, continue to the next step.
    • If the power module has an LED, check to see if the LED lights up.
      • If the LED does not light up, contact HP to replace the power module. To buy a compatible power module, right-click the following link, How to Buy HP , and then click Open in New Window .
      • If the LED lights up, continue to the next step.
Step two: Test the power on the All-in-One Follow these steps to test the power on the product.
  1. Reconnect the power supply to the rear of the product.
  2. Press and quickly release the Power button to start a Power On/Off cycle. Do not hold the button down.

Dec 02, 2010 | Computers & Internet

1 Answer

No power to computer. Outlet is good. Power cord is good.


Try to do a power drain first by unplugging the piwer cable and then press and hold the power button for ten secs.after that plug the power button again then try to restart the machine.check for any indicators that the computer is getting power like sound coming offf the computer or if the cd/dvd drive is opening, check any lights on the tower or if the fan is running if not then you might need to have the computer checked.Power supply or the motherboard needs to be replaced.If the system is still under warranty then you can call your manufacturer for support.hope this helps...

May 20, 2010 | HP Pavilion a706n PC Desktop

1 Answer

Pavillion does not start up push power on and nothing happens blinking light on back of power supply


Power supply light on or flashesPerform the following steps, in order, until power is restored or it is determined that there is a hardware failure: CAUTION: This product contains components that are easily damaged by ElectroStatic Discharge (ESD). To reduce the chance of ESD damage, work over a non-carpeted floor, use a static dissipative work surface (like a conductive foam pad), and wear an ESD wrist strap that is connected to a grounded surface, like the metal frame of a PC.
  1. Disconnect everything from the computer, including the power cord.
  2. With the power cord disconnected , press the power button on the front of the computer for five seconds.Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
    NOTE: If the power supply fan makes an inconsistent grinding sound or stops and starts erratically, replace the power supply
  3. With the power cord removed, flip the red voltage selector switch to the opposite position. Wait about five seconds, and then switch the red voltage selector switch back to its original location. Ensure that the voltage selector switch is on the correct setting, 115V for North America.Performing this step ensures that the voltage switch is engaged and set correctly for your country/region. Figure 4: Voltage selector switchc00517964.jpgPlug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
  4. Plug a lamp into the same outlet to see if the wall outlet has power. Try the computer in a different outlet in order to eliminate the outlet as a possible source of the issue. Test both to see if the wall outlets have power.
  5. Remove all extension cords, power strips, surge protectors and any converters that remove ground. Plug the power cable directly to the wall outlet. Test for power. If this fixes the issue, find the device that is causing the issue and do not use it.
    NOTE: If you find the device that was causing the problem was a surge protector, resetting a breaker or fuse on the surge protector may fix the issue.
  6. Remove all attached devices except for keyboard, mouse, and monitor.
  7. Remove any internal component that was recently added, such as video card, memory, CD, DVD, and hard drives. An added device may take more power than the power supply is rated for. If the problem goes away when the component is removed, the only option is to upgrade the power supply to power supply with a higher wattage rating.
  8. Check the power switch:
    1. With the power cord disconnected, press the power button on the front of the PC. The button should release easily and not stick in the socket.
      • If the button sticks, it should be replaced or serviced.
      • If the power button does not stick and appears to be functioning, continue using these steps.
    2. With the power cord disconnected, remove the case or side panel.
    3. Follow the wires from the power button on the front of the computer to their connection on the motherboard.
    4. Look at the power switch cables connected to the motherboard. If the cable has become disconnected, connect the power switch cable connector to the connector on the motherboard. Figure 5: Power switch connector on Motherboardc00517968.jpg
    5. Replace the side panel, plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
  9. Find the defective part:
    1. With the power cord disconnected, remove the case or side panel.
    2. Disconnect all power cable connectors from their connectors on the motherboard and from the back of internal devices (the back of drives). Make sure to label or remember where each cable connects for future reference. Figure 6: Example of common power connectionsc00540428.jpg
    3. Replace the side panel, plug in the power cord, and examine the light on the back of the power supply:
      • If the LED is on solid and is not flashing, the power supply is probably good and the problem is most likely caused by a defective component (processor, memory, PCI card) or a defective motherboard. Have the computer serviced, or remove the components and replace them, one at a time, to find and replace the defective component.
      • If the LED is still flashing (it should not flash with all connectors removed), plug the power cable into a different power outlet that is known to be good. If the LED still flashes, the power supply should be replaced.
      • If the LED light is now off, plug the power cable into a different power outlet that is known to be good. If the LED stays off, the power supply should be replaced.

      NOTE: If an electrical storm or power surge has recently occurred, then it is more likely that the power supply, the modem, or motherboard is damaged and requires replacement. If the power supply was damaged due to power outage or storm, this may not be covered under the "act of nature" policy in the warranty statement. Refer to the warranty statement that came with your computer for more information.

Feb 28, 2010 | HP Pavilion a1610n PC Desktop

1 Answer

My hp pavilion a336n will not turn on. When I plug the power cord in the light on the back of the hard drive will turn on, but when I press the power button nothing happens... any suggestions?


To resolve this issue you may need to open the chassis (the computer cabinet). You can call HP specialized support for help but they charge you for the support. You can call them at 866-211-5207.

OR - Follow the given steps.

Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure: CAUTION: This product contains components that are easily damaged by ElectroStatic Discharge (ESD). To reduce the chance of ESD damage, work over a non-carpeted floor, use a static dissipative work surface (like a conductive foam pad), and wear an ESD wrist strap that is connected to a grounded surface, like the metal frame of a PC.
  1. Disconnect everything from the computer, including the power cord.
  2. With the power cord disconnected , press the power button on the front of the computer for five seconds. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps. NOTE: If the power supply fan makes an inconsistent grinding sound or stops and starts erratically, replace the power supply
  3. With the power cord removed, flip the red voltage selector switch to the opposite position. Wait about five seconds, and then switch the red voltage selector switch back to its original location. Ensure that the voltage selector switch is on the correct setting, 115V for North America. Performing this step ensures that the voltage switch is engaged and set correctly for your country/region. Figure 4: Voltage selector switchc00517964.jpg Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
  4. Plug a lamp into the same outlet to see if the wall outlet has power. Try the computer in a different outlet in order to eliminate the outlet as a possible source of the issue. Test both to see if the wall outlets have power.
  5. Remove all extension cords, power strips, surge protectors and any converters that remove ground. Plug the power cable directly to the wall outlet. Test for power. If this fixes the issue, find the device that is causing the issue and do not use it. NOTE: If you find the device that was causing the problem was a surge protector, resetting a breaker or fuse on the surge protector may fix the issue.
  6. Remove all attached devices except for keyboard, mouse, and monitor.
  7. Remove any internal component that was recently added, such as video card, memory, CD, DVD, and hard drives. An added device may take more power than the power supply is rated for. If the problem goes away when the component is removed, the only option is to upgrade the power supply to power supply with a higher wattage rating.
  8. Check the power switch:
    1. With the power cord disconnected, press the power button on the front of the PC. The button should release easily and not stick in the socket.
      • If the button sticks, it should be replaced or serviced.
      • If the power button does not stick and appears to be functioning, continue using these steps.
    2. With the power cord disconnected, remove the case or side panel.
    3. Follow the wires from the power button on the front of the computer to their connection on the motherboard.
    4. Look at the power switch cables connected to the motherboard. If the cable has become disconnected, connect the power switch cable connector to the connector on the motherboard. Figure 5: Power switch connector on Motherboardc00517968.jpg
    5. Replace the side panel, plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
  9. Find the defective part:
    1. With the power cord disconnected, remove the case or side panel.
    2. Disconnect all power cable connectors from their connectors on the motherboard and from the back of internal devices (the back of drives). Make sure to label or remember where each cable connects for future reference. Figure 6: Example of common power connectionsc00540428.jpg
    3. Replace the side panel, plug in the power cord, and examine the light on the back of the power supply:
      • If the LED is on solid and is not flashing, the power supply is probably good and the problem is most likely caused by a defective component (processor, memory, PCI card) or a defective motherboard. Have the computer serviced, or remove the components and replace them, one at a time, to find and replace the defective component.
      • If the LED is still flashing (it should not flash with all connectors removed), plug the power cable into a different power outlet that is known to be good. If the LED still flashes, the power supply should be replaced.
      • If the LED light is now off, plug the power cable into a different power outlet that is known to be good. If the LED stays off, the power supply should be replaced.
      NOTE: If an electrical storm or power surge has recently occurred, then it is more likely that the power supply, the modem, or motherboard is damaged and requires replacement.

Oct 06, 2009 | HP Computers & Internet

1 Answer

Fast green blink


Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure:

1.Disconnect everything from the computer, including the power cord.
2.With the power cord disconnected , press the power button on the front of the computer for five seconds. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
NOTE: If the power supply fan makes an inconsistent grinding sound or stops and starts erratically, replace the power supply

3. With the power cord removed, flip the red voltage selector switch to the opposite position. Wait about five seconds, and then switch the red voltage selector switch back to its original location. Ensure that the voltage selector switch is on the correct setting, 115V for North America.
Performing this step ensures that the voltage switch is engaged and set correctly for your country/region.

4. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
5. Plug a lamp into the same outlet to see if the wall outlet has power. Try the computer in a different outlet in order to eliminate the outlet as a possible source of the issue. Test both to see if the wall outlets have power.
6. Remove all extension cords, power strips, surge protectors and any converters that remove ground. Plug the power cable directly to the wall outlet. Test for power. If this fixes the issue, find the device that is causing the issue and do not use it.
NOTE: If you find the device that was causing the problem was a surge protector, resetting a breaker or fuse on the surge protector may fix the issue.
8. Remove all attached devices except for keyboard, mouse, and monitor.
9. Remove any internal component that was recently added, such as video card, memory, CD, DVD, and hard drives. An added device may take more power than the power supply is rated for. If the problem goes away when the component is removed, the only option is to upgrade the power supply to power supply with a higher wattage rating.
10. Check the power switch:
a. With the power cord disconnected, press the power button on the front of the PC. The button should release easily and not stick in the socket.
  • If the button sticks, it should be replaced or serviced.
  • If the power button does not stick and appears to be functioning, continue using these steps.
11. With the power cord disconnected, remove the case or side panel.
  • Follow the wires from the power button on the front of the computer to their connection on the motherboard.
  • Look at the power switch cables connected to the motherboard. If the cable has become disconnected, connect the power switch cable connector to the connector on the motherboard.
  • Replace the side panel, plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
12. Find the defective part:
  • With the power cord disconnected, remove the case or side panel.
  • Disconnect all power cable connectors from their connectors on the motherboard and from the back of internal devices (the back of drives). Make sure to label or remember where each cable connects for future reference.
  • Replace the side panel, plug in the power cord, and examine the light on the back of the power supply:

13. If the LED is on solid and is not flashing, the power supply is probably good and the problem is most likely caused by a defective component (processor, memory, PCI card) or a defective motherboard. Have the computer serviced, or remove the components and replace them, one at a time, to find and replace the defective component.

14. If the LED is still flashing (it should not flash with all connectors removed), plug the power cable into a different power outlet that is known to be good. If the LED still flashes, the power supply should be replaced.

15. If the LED light is now off, plug the power cable into a different power outlet that is known to be good. If the LED stays off, the power supply should be replaced.

NOTE: If an electrical storm or power surge has recently occurred, then it is more likely that the power supply, the modem, or motherboard is damaged and requires replacement.

Apr 11, 2009 | HP Pavilion a340n (DQ099AABA) PC Desktop

1 Answer

My hp desktop computer will not turn on


If you cant see or heard any boot up sounds, fans and especially if you dont see any power or green led lights at all ;

If your power cord is plugged into a power strip or surge protector, power cycle your strip or surge protector by turning off and on.

If power outlet has a wall switch make sure its on

Check that your power cable is securely plug in to both ends

Check that at the back of computer, specifically on the back of the power supply unit that the switch is on "1" position and NOT on the "0" position ( 1 is "ON" , 0 is "OFF" )

Check that the power outlet is not damaged by pluging in another good known device (such as a blowdryer, shaver, lamp, radio, etc, etc) to see if its the power outlet or not.

Can you see power or green led lights and hear the fan on but no display ? If this is the case , check your monitor connection at both ends. If they are secured open up your case and see if you can smell any burnt smell or check that all cards especially video cards are properly seated.

Jan 21, 2009 | E-Machines eMachines Desktop PC

2 Answers

Front panel Ac Switch failing to start computer.


Try these steps.
If Power supply light does not turn on (or no power supply LED)
Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure:
NOTE: If the Power Supply fan spins when the PC is turned on but the light does not come on, it is possible the LED is defective. If this is the case, use the section Power supply light comes on or flashes .
1. Disconnect everything from the PC, including the power cord.
2. With the power cord disconnected, press the power button on the front of the computer. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
3. Replace the power cord with another power cord, like the one used by the monitor.
Test to see if the computer can turn on. If not, continue using these steps.
4. Ensure that the voltage selector switch is on the correct setting, 115V for North America.
5. With the power cord removed, flip the red voltage selector switch to the opposite position, wait about five seconds, and then switch the red voltage selector switch back to its original location.
This ensures that the voltage switch is engaged and set correctly for your country/region.
6. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
7. Plug a lamp into the same outlet to see if the wall outlet has power. Try the computer in a different outlet in order to eliminate the outlet as a possible source of the issue. Test both to see if the wall outlets have power.
8. Remove all extension cords, power strips, surge protectors and any converters that remove ground. Plug the power cable directly to the wall outlet. Test for power. If this fixes the issue, find the device that is causing the issue and do not use it.
9. Use a vacuum cleaner to remove the build-up of dust from the power supply fan vent holes. Make sure that the PC is turned off and that the power cord is plugged into a grounded outlet. Only use the end of the vacuum hose near the outside of the fan entrance.
Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
10. If all of the above steps have been tried and the power supply light remains off, use the steps in the next section, use the next section Power supply light comes on or flashes , to reseat the cables and check the power switch connector.

Jan 11, 2009 | Compaq Presario SR1000T (568657) PC...

1 Answer

CPU doesn't turn on!!


    • Power supply light on or flashes Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure: CAUTION: This product contains components that are easily damaged by ElectroStatic Discharge (ESD). To reduce the chance of ESD damage, work over a non-carpeted floor, use a static dissipative work surface (like a conductive foam pad), and wear an ESD wrist strap that is connected to a grounded surface, like the metal frame of a PC.
      1. Disconnect everything from the computer, including the power cord.
      2. With the power cord disconnected , press the power button on the front of the computer for five seconds. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps. NOTE: If the power supply fan makes an inconsistent grinding sound or stops and starts erratically, replace the power supply
      3. With the power cord removed, flip the red voltage selector switch to the opposite position. Wait about five seconds, and then switch the red voltage selector switch back to its original location. Ensure that the voltage selector switch is on the correct setting, 115V for North America. Performing this step ensures that the voltage switch is engaged and set correctly for your country/region. Figure 4: Voltage selector switch c00517964.jpg Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
      4. Plug a lamp into the same outlet to see if the wall outlet has power. Try the computer in a different outlet in order to eliminate the outlet as a possible source of the issue. Test both to see if the wall outlets have power.
      5. Remove all extension cords, power strips, surge protectors and any converters that remove ground. Plug the power cable directly to the wall outlet. Test for power. If this fixes the issue, find the device that is causing the issue and do not use it. NOTE: If you find the device that was causing the problem was a surge protector, resetting a breaker or fuse on the surge protector may fix the issue.
      6. Remove all attached devices except for keyboard, mouse, and monitor.
      7. Remove any internal component that was recently added, such as video card, memory, CD, DVD, and hard drives. An added device may take more power than the power supply is rated for. If the problem goes away when the component is removed, the only option is to upgrade the power supply to power supply with a higher wattage rating.
      8. Check the power switch:
        1. With the power cord disconnected, press the power button on the front of the PC. The button should release easily and not stick in the socket.
          • If the button sticks, it should be replaced or serviced.
          • If the power button does not stick and appears to be functioning, continue using these steps.
        2. With the power cord disconnected, remove the case or side panel.
        3. Follow the wires from the power button on the front of the computer to their connection on the motherboard.
        4. Look at the power switch cables connected to the motherboard. If the cable has become disconnected, connect the power switch cable connector to the connector on the motherboard. Figure 5: Power switch connector on Motherboard c00517968.jpg
        5. Replace the side panel, plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
      9. Find the defective part:
        1. With the power cord disconnected, remove the case or side panel.
        2. Disconnect all power cable connectors from their connectors on the motherboard and from the back of internal devices (the back of drives). Make sure to label or remember where each cable connects for future reference. Figure 6: Example of common power connections c00540428.jpg
        3. Replace the side panel, plug in the power cord, and examine the light on the back of the power supply:
          • If the LED is on solid and is not flashing, the power supply is probably good and the problem is most likely caused by a defective component (processor, memory, PCI card) or a defective motherboard. Have the computer serviced, or remove the components and replace them, one at a time, to find and replace the defective component.
          • If the LED is still flashing (it should not flash with all connectors removed), plug the power cable into a different power outlet that is known to be good. If the LED still flashes, the power supply should be replaced.
          • If the LED light is now off, plug the power cable into a different power outlet that is known to be good. If the LED stays off, the power supply should be replaced.
          NOTE: If an electrical storm or power surge has recently occurred, then it is more likely that the power supply, the modem, or motherboard is damaged and requires replacement. If the power supply was damaged due to power outage or storm, this may not be covered under the "act of nature" policy in the warranty statement. Refer to the warranty statement that came with your computer for more information.

Jun 20, 2008 | Computers & Internet

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