replaced dell power supply now dimension won't boot

March 26, 2013 at 14:43:55
Specs: Windows Vista

Hi All:
I have a Dell dimension 3000. I was running Windows XP. I went to power on and it booted up and ran for a few seconds then went dead with a flashing green light. I read the dell manual which said that a flashing green light means the computer is in sleep mode and you need to touch any key or move the mouse to wake it up. I tried that and pressed escape with no response. I did that several times and even held the power on button solidly as it powered up it still would not run for more that a few seconds. To get it to power on again I must unplug the power cord to stop the flashing green light. After a few more times the amber light went on. I thought it was the power supply so I took the power supply from my other Dell a 4550 dimension which I know has a good P.S. It stayed on but it goes into a screen that says press F1 or F12. Pressing those keys has no effect. The computer won't boot up and go into Windows XP as before. Any ideas?
Don in Seattle

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March 26, 2013 at 15:54:19
I remember that happened to me once. The green light near the power button would keep flashing and I would have to pull the plug to shut it down. Turns out I had the wrong 4 pin plug plugged into the cpu socket. Make sure you have the right 4 pin cpu plug plugged in. It has a small clip on it that snaps on the housing to keep it from pulling off. I think I was using a 4 pin pci-e plug. After I plugged the right connector in, it fired right up. I was in a hurry and wasn't paying attention.

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March 26, 2013 at 19:24:32
Yeah, check its innards and make sure you didn't leave something disconnected or connected wrong. If that's not it, it may be an issue with the hard drive. Start it up and let it sit there for a few minutes. See if an error eventually comes up. Try F1 and F12 again. If that's not it, disconnect the hard drive and start it up. See if it posts an error about a missing hard drive or missing operating system.

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March 26, 2013 at 20:33:24

Good suggestions here. I didn't touch the hard drive. Can it go out that easy after putting in a new power supply? I will check the hard drive connections again to be sure. As far as F1 and F12 that has no effect. At least I have power up and running anyway.

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Related Solutions

March 26, 2013 at 21:24:56
When a power supply goes out it often damages other hardware. Usually it's the motherboard. In your case the motherboard seems to be OK, at least enough to do the initial posting, so maybe it's something else.

If you have any add-on cards, temporarily remove them in case the problem is with them. Disconnect all the drives too.

Somewhere on the motherboard there should be a 'clear cmos' jumper. With the power cord disconnected jumper it to the 'clear' position for a few seconds and then back to 'standby'. That will clear the cmos/bios setup settings. The problem is probably not with those settings but sometimes it seems to work. You may need to consult your manual for the jumper location.

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March 26, 2013 at 21:56:26

Hi. I hadn't heard of that jumper trick before it sounds promising. And I will remove any add on cards temporarily. Many thanks.

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March 27, 2013 at 06:23:20
"As far as F1 and F12 that has no effect"

USB keyboard? Try a PS/2.

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April 1, 2013 at 11:53:47
Hi All:
I turned this project over to my son after he said solving the problem probably wasn't related to the jumper cable trick. I told him if you think you can do better than you can fix it. I will keep you posted if he solves the boot up problem.

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April 1, 2013 at 13:49:46
how about F2?? thats the bios setup, see if you can get there and move around in it using the arrow keys. exit not saving changes. stay in it for 30 mins if you can


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April 5, 2013 at 09:39:23

Hi All:

I will pass that F2 suggestion to my son. I also told him about the four diagnostic LED lights in the back of the computer and how they have different codes related to malfunctions.

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