Question about HP Compaq Presario SR1720NX (EL435AA) PC Desktop

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My Presario SR1720NX has a blinking green light on the back near the power supply when plugged in but no power. Already replaced power supply - is my system board a goner?

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Would check the switch at the front of the pc.Have had several issues with that particular switch getting pushed out on compaqs just enough to allow them not to turn on.Would also verify that all powers supply plugs are pushed in all the way.

Posted on Apr 06, 2011

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I would suggest trying to replace the power supply. If that does not fix the issue, i would need to hear more about the computer.

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Do you mean the little green LED light near where you plug the power cable into the back of the computer? If that's the blinking light then unfortunately, this means that power is getting to the power supply but it is not going from the Power Supply to the Motherboard/Devices. The power supply is broken and is not converting the power from the wall to the proper voltage for the Motherboard/Devices. You will have to replace the power supply.

Call HP, and I hope you are in warranty and get it replaced for free or you can order the exact same one from HP that originally comes with that model. 1-800-HP-INVENT for their tech support line.

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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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Pc will not power up. Green light on power switch blinking like a slow stobe light. I tried un plugging it, did not work. I tried swicthing it to 240v, then back to 120v did not work. I tried an alternate...


The power supply is shot. Best suggestion is to replace it. You need to make sure it is replaced with the same model power supply. Check online for a replacement unit.

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I have a Compaq SR 1000 desktop set and I can't get the power to go on. When I plug the unit in a green light in the back keeps blinking. When I disconnect, hold in the power button the blinking stops, but...


Hello shapscomp

The blinking green light is likely your Ethernet card's LED. Is the blinking light located near your Ethernet (network) cable?

It sounds as though your power supply has failed. You may be able to purchase a replacement power supply for it.

Would you like some assistance in deterimining if that is the case?

Thank you
BJ

Apr 05, 2008 | Computers & Internet

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