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Power supply the pc does not turn on, and there is a blinking green light in the back

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Actually that means your motherboard has burned out and needs to be replaced. Your power supply is reporting ok with the blinking light. Depending on your model it could cost between $200-400 for a tech to fix.

Posted on Sep 11, 2008

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Vaio desktop blinking power supply


Remove the side pane to access your motherboard cables, etc. Locate the connector on your motherboard that contains the wires going from your power supply to your motherboard. It will be a large, rectangular connector with a lot of individual wires It is not a ribbon cable but should be located next to a ribbon cable connector and next to a green blinking light on your motherboard (when the power supply is plugged into the wall). Note: This green blinking light is in addition to the green blinking light on the back of the PC.

This next step is important: You have to disconnect the connector noted above from the motherboard WHILE the power suply is plugged into the wall. Wait a few seconds and plug it back in. The blinking reen light on the motherboard should now be a solid green light. The PC should now power up.

If the steps above don't work you will need to get a new power supply.

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HP PAVILION A 1520N pc DESK TOP does not turn on when power button pressed. has power to end of cord. Power button does not light up. little green light on back by power source blinking green


Bad Power supply. Look on the side of your current power supply and find the wattage rating, and buy one of the same rating or higher. Some place like newegg.

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1 Answer

Computer will not turn on. green light blinking


Try replacing the power supply, a blinking green light usually means the power supply is missing an output voltage. If you do that and you still get a blinking green light then the motherboard will need to be replaced.

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My vaio wont turn on and the green light in the back keeps blinki


The green light blinking in the back indicates that the power supply went bad and is not turning on, go ahead and get the power supply replaced. Normally that light is supposed to be fully lit and green.

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Try a different known working power supply on that computer, the green light on the power supply should be constant and not blinking. The green light on the motherboard shouldn't be blinking either but if its not getting the right voltage from the motherboard then it will blink as well.

Get a different power supply and see what happens. At that point the power supply green light should be constant, if its not then your motherboard is faulty at that point, if yout the green light is blinking on your motherboard, if both are constant then reseat the memory and CPU and only have the power supply hooked up to the motherboard and not to anything else.

If you still can't get video then at that point you know the motherboard is definitely bad.

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1 Answer

Will not pwer up. Greenlight blinking on back


The green blinking light can mean there is a problem with the power supply.

Try unplugging the computer from the wall, and turning on the pc on switch.

After a few minutes, try plugging it back in.

If that does not start things up, you may have a bad power supply.

If the power supply is bad, these models take standard power supplies. You should get an ATX 350Watt or higher power supply.

They are easy to replace, unplug the power from the wall, disconnect all the cables inside the computer. Unscrew the four phillips screws outside the back of the computer where the power supply is attached to the case.

Remove and replace.

If you don't feel comfortable with this, a good local computer shop can help you out.

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Computer wont start up. Blinking green light in the back of tower


I've had that happen twice to my Vaio desktop and there was a very easy fix. I'm not a techie, but I found a recommended solution online when this first happened six months ago. I couldn't find the solution again, but I fortunately remembered the steps.

Remove the side pane to access your motherboard cables, etc. Locate the connector on your motherboard that contains the wires going from your power supply to your motherboard. It will be a large, rectangular connector with a lot of individual wires It is not a ribbon cable but should be located next to a ribbon cable connector andnext to a geen blnking light on your motherboard (when the power supply is plugged into the wall). Note: This green blinking light is in addition to the green blinking light on the back of the PC.

This next step is important: You have to disconnect the connector noted above from the motherboard WHILE the power suply is plugged into the wall. Wait a few seconds and plug it back in. The blinking reen light on the motherboard should now be a solid green light. The PC should now power up.

It worked twice for me; I hope it works for you.

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NO! Do not buy a new motherboard or pc without checking some things.

First, is the green light you say is blinking on the Power Supply itself?

If it is, then the power supply is dead. A blinking light on a PSU means that it can no longer hold a charge and needs to be replaced. Get a new one and pop it in.

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No power, power supply & motherboard green light blinking


I had the same exact problem for the same exact reason. Plug the power cable into the back. Open up the side of the case and unplug all the wires that the power supply plugs into. The motherboard, harddrive, cd & dvd drives, everything. wait about 10 minutes and plug them back in, plugging the BIG cable that connects to the motherboard back in LAST. This will make the light go from blinking to solid. I think it is a safety? to protect the motherboard from damage.

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