Question about HP Compaq Presario SR1230NX (PJ518AA) PC Desktop
Blinking green light on back of power supply and nothing works, psu is atx-300-12eb3
I read all the solutions, followed the manufacturers instructions exactly, replaced the cmos battery and nothing solved the problem (blinking light on PSU after a power failure and no startup at all). I had ascertained that the PSU was intact by disconnecting all the PSU connections to drives and motherboard at which time the PSU LED stopped blinking and was constantly on.
Just before throwing my computer away I decided to follow the instructions listed by "guest" to unplug the power to the motherboard and then with the power supply back on to plug the cables back into the motherboard. No only did sparks not fly, but it started up and ran perfectly! Many thanks to "guest."
Posted on Sep 18, 2008
I, too, simply opened the computer, unplugged the power cord from the motherboard and re-plugged it back in after a few seconds. Everything works now...
Posted on Jan 20, 2010
OMG!!! We promised our daughter she could have the Compaq, and I took it upstairs but-- it wouldn't come on, and the green light on the back was blinking, as others have posted. I tried everything but nothing helped, and I almost had a heart attack. Then I found this site and tried as the "Guest" suggested (I know NOTHING about computers, so if I can do it, anyone can). I unplugged the large clip of wires leading from the power supply to the mother board, took a 6-inch piece of 12-gauge wire, put one end in against the green wire (I do know a little about wiring, which is why I was willing to try this-- "green" is the grounding wire) and the other end to where one of the black wires would connect when plugged into the mother board. I WORE LEATHER GLOVES, WHICH ARE AS GOOD AS ELECTRICIANS' GLOVES, AND HELD THE PIECE OF WIRE WITH INSULATED PLIERS. Then I plugged in the PC. Signs of life! I couldn't believe it!!! As soon as I pulled the wire away, the computer went dead again, but as "Guest" suggested, I then plugged the power supply wires back into the mother board, crossed my fingers, and pushed the power button on the front of the PC. Bingo. Incredible-- it works perfectly. From reading other posts, the problem will recur if I unplug the PC-- which I'm NOT going to do. By the way, all of this happened following a power outage-- as others online have said-- it must have fried the "ground" inside the computer somehow, and this method bypasses it. At any rate, many thanks to "Guest," I never could have fixed our comp w/out your post!!!
Posted on Jan 31, 2011
I used the blow dryer trick & unbelievably it worked...found this remedy here: http://talk19.wordpress.com/2008/01/13/hp-m7088d-power-supply-led-blinks-green/
Posted on Feb 12, 2013
I had the same problem today with my compaq presario sr1230. There were a lot of recent storms and the computer had been off a couple of times when I came home from work. I posted a question and looked at some of everybody's posts and am now at more of a peace with this. I too have no idea what is causing the problem but plugging in the avx power supply (20 prong) while the main power supply is plugged in simply works. Thanks everyone.
Posted on Jul 08, 2013
There's a fix for this - it requires you to be creative, but this is what I found oout with both my HP A847c PC's (both went bad almost at the same time:
on the Molex 24 pin connector there is 1 green wire (pin 16). make a split on this wire (aka connect a new wire to this one with a split clamb or however you want to do this). do the same on any of the black ones (common/ground) - Pin 15 for example. at this point in time put 2 wire nuts on the lines (strip .5 inch off at the end). leave all connectors connected to the board and devices. now the trick... plug in the power cord to the wall outlet. result blinking green light on the power supply. now take the wire nuts of the 2 wires and connect them for .5 seconds minimum.... PSU fan should turn on (if not then you WILL have a bad PSU). disconnect the 2 wires... put wire nuts back on... voila, the green light is now solid and you can use your PC again (power on/off will just work fine AS LONG AS you leave the Power Supply connected to a live power outlet. When you disconnect the power from the Power supply, you need to do the same steps again. What I personally did is open the power supply and connected 2 pieces of 22 guage wire to the green and black line and drilled a hole in the back of the power supply and stuck the wires out. this way you will not have to open the PC. I will put a push button on the wire.
What this does is: normally the motherboard - when pc is turned on - will shorten the Pin 16 (5V) to ground, signalling the Power Supply to turn on (and as it seems put the power supply in the correct mode, kind of booting the Pwoer supply). What actually is broken I don't know... motherboard or PSU... I think the PSU. although the new Power Supply now is Dead Dead :-(
I did replace the "vaulty" power supply with a new one and it did work. so I would guess just the "power supply boot up" is not working onymore.
hope this helps.
Posted on Jan 18, 2013
I had the same problem with my a450n. Every time I removed power from the unit ( throwing the switch on my power strip), it crapped out and could only be reset by pulling all of the connectors on the MB while the power supply was plugged in and unit was off. It turned out to be a bad power supply.
Posted on Dec 21, 2007
Ty, i did fix it by unplugging the psu from the motherboard and re-plugging it back in, while ac cord was plugged in
Posted on Oct 31, 2007
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Posted on Jan 02, 2017
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