Question about HP ATX-300-12Z, ATX-300-12Z Rev. CDR, HP P/N: 5188-2625, Genuine Bestec 300W PS2 Replacement Power Supp... (ATX30012ZREVCDR) Power Supply
I have a Compaq desktop machine that I recently added 1GB of RAM. Now, the machine will not turn on and the power supply light on the back of the CPU flashes green. If I pull the ATX connector from the motherboard, the supply stays solid green. Is the motherboard fried? I tried removing the RAM, reseating the RAM & blowing out all of the dust from the PC, motherboard, fans, & power supply.
i have the same problem ill try some of this advice
Hi. NO, *********** board is not fried. I am not sure what the problem is but I do know how to fix it. It is usually casued by power outages (even if you have UPS supply).
1. TAKE OUT THE ELECTRICITY LEAD TO THE COMPUTER. Look inside the computer and find the bunch of wires coming from the power supply unit (the box thing at the top with the fan and all those colouted wires!).
2. Find where these wires run into a plastic connector and plug into the mother board. Unplug it.
3. Now plug the electicity lead back into the computer. The light should now stay ON.
4. Plug in the connector again... and boot up. Leave it run a while to convince it!
5. Repeat this process if it does not work first time.
This should fix your problem . It works for me when I get this problem.
Friend in Spain
Posted on May 09, 2009
I have the same power supply here with the flashing green light. The computer is a Compaq desktop also. Disconnected the light turns on solid. I had added extra ram like you did. Replaced with a 500W power supply and computer works fine. I'd say that the problem is the power supply.
Posted on Apr 10, 2009
Spanish Amigo you are my new best friend. Thank-you so much!
Posted on Oct 13, 2014
The problem is the +5V Stand By cirquit in the power supply. It has bulged capacitor. It is very easy for a techically minded person to repair it. The reason it showed the problem after you installed new ram is because you unplugged the PS from the outlet and the bad capacitor loses a bit of his capacitance when it is not under voltage. The capacitor costs less than a dollar. It is 2200uF/6.3V as I remember. I have repared hundreds of those supplys with the same problem, this is my job.
Posted on Apr 18, 2014
Did just like it said and it worked thanks
Posted on Jul 12, 2012
From your description, I would guess you damaged the connections when you tried to install the RAM. When the connectors get short circuited, the power supply won't start.
Best advice, take it to a computer shop and have a professional examine it for damage. There is a chance it could be repaired. If unrepairable, time for a replacement motherboard.
Posted on Jan 10, 2009
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Posted on Jan 02, 2017
I had the same exact problem. Moved computer to another location and the power supply was blinking green and the computer would not turn on. After reading somep posts online, while the power was connected to the computer, I pulled the main power plug to the motherboard. After doing this the green light was not blinking anymore and was solid green. While power was still applied to the computer, I reconnected the power plug to the mother board and the light stayed solid green. The computer now started up properly. :)
Hope this helps!
Posted on Aug 05, 2008
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