Question about Dell Dimension 4400 Power Supply ** FREE ** (DE4400300WB) Power Supply

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Computer doesn't come on.

The only lights that come on are one green one on the motherboard and the one on the power button. The four little lights on the back do not come on, no fan, nothing.
Would this be the power supply, motherboard, or something else?

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  • mtennant Oct 09, 2008

    What does the FixYa headline "Dell Dimension 4400 Power Supply ** FREE **" mean?

  • aweaver414 Dec 08, 2008

    same issues on my Demension 4400, flea light is on, no fans, no hard drive start, no bios beeps, just quiet high pitched sound from power supply.

  • Dick
    Dick May 11, 2010

    There is no way to tell for sure without further testing. Replace the memory one piece at a time. Reseat all components you can and try again.

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Easy check is: power the system off. Unplug the power supply from the outlet. Hold the power on button in for at least 10 seconds. Remove the CMOS battery. Reconnect the power supply to power. Attempt to power up. See what happens. If it comes up and asks for you to set config, power down, unplug the power supply and hold the power on button for 10 secs. Replace the CMOS battery with a new one (CR2032 button battery...about $5 for 2 in the Wal-Mart photo dept) and power on. The reason for the repetition is to reset the BIOS.

Posted on Jan 22, 2010

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Dell Dimension 4400 Won't Turn On


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Flashing Green Light on Power BESTEC Power Supply


This is an easy fix so here you go nice and simple:

Problem: Your motherboard circuit has been cut.

Causes: Power disconnected during operation. Power outage or short in the surge protector.

Symptoms: Flashing green light on both motherboard and power supply. System will not power on.

Solution:

Step 1: Ensure that both the power supply and the motherboard lights are flashing green, not solid or off.
Step 2: While the power is on, disconnect the power supply from the motherboard. This connection is the largest of the connections and should be listed as the 'P1' or 'Primary' power connection.

Step 3: Wait until the green light on the motherboard stops flashing and check to ensure that the green light on the power supply is now solid. If it is not solid, disconnect the power to the power supply and wait until the light turns off completely. Then reconnect, it should be solid now.

Step 4: While the power is on, reconnect the P1 connection to the motherboard and you should now see that the light on the motherboard is solid.

Step 5: Power on your PC. The problem should not persist.

Warnings: If the power supply light remains flashing after you have restored power to it while it is disconnected from the motherboard, it may be a system failure in the power supply itself requiring replacement. Always be careful when working with an active or live power machine.

I hope this helped! Good luck!

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