Flashing green light on power supply

minahan1 - Updated on Oct 15, 2017 at 10:55 AM
 lala - Dec 28, 2017 at 10:40 AM

My Acer laptop power supply light is flashing and it wont power up. Battery does not charge. Several people I talked to have had the same problem. Do I need to replace the motherboard.


2 replies

HP Power supply flashing green light

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.

  • 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.
Thank you guest.000, I could kiss you!
This method didn't work for me unfortunately. Everything was fine until the last step, the motherboard still flashes. Any other methods that I could try?
Unfortunately it did not work for me but I appreciate you posting the suggestion. Thanks anyway.
This happens to my desktop computer every time we lose power. I turn on my blow dryer to high and blow the hot air into the fan next to the light. The green light blinks faster and faster, until it turns solid and then I can turn on the computer. It takes about 1 minute. Don't know why it works. Read it online sometime and have been using this fix for a few years.
Great tip...seems this is the only way it works for my hp desktop...
boots on,solid green light back and motherboard...not flashing anymore.
Only if I unplug it, it goes back to flashing light. And wont boot....