Question about Compaq Presario s4020wm (DK214AR#ABA) PC Desktop

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Power supply is good, but computer will not turn on, it does absolutely nothing. The green light on the power supply is blinking when connected to the motherboard

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You may have problem in your motherboard take it to workshope.

Posted on May 10, 2010

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Chances are your power supply and computer is fine! From other forums on this problem (which I also had), I've learned the following:
1. If you unplug the computer for a half hour or so (the blinking green light will gradually slow down and quit) and plug it back in, the situation will correct itself and the green light will be steady; however if this does not work,
2. a reset that works for a lot of people with the blinking light problem involves leaving the power supply plugged in and unplugging the power supply connection at the motherboard (it usually also has a blinking green LED) and plugging it back in. To read up on how to do this, Google "blinking green light on computer power supply" and read through some of the forums and you'll come on more specific instructions. Usually, you have to wade through everybody telling you to replace the power supply or your motherboard is fried. It's worth a try for a quick fix, just in case those situations don't apply!

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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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Your power supply is bad--you will need to replace. I suggest looking at tigerdiect for a replacement.

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BLOWN YOUR FUSE NEED NEW FUSE IN THE POWER SUPPLY

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Most common reason for this would be defective power supply, if it is less than 1 year old, may still be under warranty. If older then you can usually find replacement power supply $40+ at local computer store. Not to difficult to replace, average tech could swap it in less than 15 minutes. Can test it with one of these: http://www.antec.com/Detail.bok?no=429

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