Question about Gateway Bestec ATX-300-12EB3 305w Power Supply (ATX30012EB3) Power Supply

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Gateway 507 GR

Will not power on and the power supply LED light will either flash or not flash at all. I was told to replace the motherboard. Did that and still nothing. When i unplug the power supply the CPU fan starts and stop in short bursts. HELP!!!

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  • hedge2720 Feb 26, 2008

    Thanks goldflack. I should have listen to my instinct instead of "Tech Support" from Gateway.

  • jasonsty Dec 03, 2008

    have the same problem. The light on the MB doesn't light with the original powersupply, but can get fans to spin briefly if cpu fan plugged into different fan pins. Tried another powersupply and light on MB lights, but the fans don't spin at all.

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Change your power supply.

Posted on Feb 26, 2008

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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.

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