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Compaq power led flashes red...

Posted on 2004-09-22
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Last Modified: 2007-12-19
i am working on a compaq desktop, and cannot get it to turn on. When i plug the power cord in, the fans turn and i have a green power light for around 1 second. Then the fans quiet, and the power led flashes red. I can hit the power button, and the fans will turn for a second, then quiet again. The flashing red light never stops. WHat could cause this. Customer said it would turn on before they brought it in. Any ideas?
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Question by:jasonsandlin
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by:sirbounty
ID: 12123105
Have you tried reseating the internal components?  What model Compaq is it?
Probably a card or something has come loose inside...
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by:FatherErvin
ID: 12123131
What was the original issue they brought it in for?

I would think power supply myself.
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by:jasonsandlin
ID: 12123207
yeah, i figured the power supply, but the problem was a missing kernel file when they brought it in. figured we would just reinstall windows. well, we cant get it to even turn on. they said they had no problem turning it on.
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by:sirbounty
ID: 12123284
Which leads me to believe it's more of a dislodged card/component...
You can certainly try a power supply though.  Have you tried reseating everything?
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by:jasonsandlin
ID: 12123345
yes, took out everything, and put it back. still same thing. it is a presario 5000 series.
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by:Callandor
ID: 12123672
Check the cpu fan to see if it is working - many times, a nonworking one or one that isn't plugged in properly will exhibit thos symptoms.
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by:jasonsandlin
ID: 12123842
all the fans are working and plugged in correctly. when i push the power button, the cpu and case fan spin for a second, then i get the flashing red light.
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by:Callandor
ID: 12124438
Is this an AMD motherboard?  They come with this protection built-in.  Otherwise, you should swap the power supply, which others have been saying.
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by:jasonsandlin
ID: 12124912
no, it is a P4 board. is the power supply the only thing that it could be? I would think so, but i dont want to have to order one and that not be the problem. it is not an ordinary power supply. it has 12 rows of connectors for the board instead of 10.
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by:Callandor
ID: 12125312
There's always a chance that the most likely cause of a problem is not what you think it is, but I think the power supply is the front-running candidate.  Without a bin of spare parts, this can get expensive, but sometimes, there's no other way.
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by:Iggy79
ID: 12127211
I would also make sure that the speaker is hooked up so you can hear the POST test.  Is it beeping?  Everyone always wants to blame the power supply but that is not the case most of the time.  If it is the power supply most POST do not beep.  But if you get a beep then it might not be the case.  The other thing is if it is a bad power supply then why would you get the LED lit up???.  You can get a power supply tester for $15 at almost any radio shake or anywhere they sell computer stuff.  If not I use newegg.com they sell good stuff.  But it sounds to me that the tester is your first step on the adventure.
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by:jasonsandlin
ID: 12127674
well, the fans do not stay on, but the red led does continue to blink. wierd...
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by:Iggy79
ID: 12128329
But it would still help to know if the power supply is good?
If there is a POST results?  How many beeps and how long they are?
If you have a multi meter you can test you Power supply your self here is a link on how to do that.

http://www.duxcw.com/dcforum/DCForumID3/447.html

Besides that the only thing I think it might be and this is a reach is that your hard drive has crashed and that would explain your red light.  Because it comes on when the logic circuits are powered.
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by:Iggy79
ID: 12130276
Did that multi meter test come out ok?  did you find any other test results?  Just letting you know I am still her to help you find the solution.
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by:nobus
ID: 12130913
It can be a power supply that has gone into protect mode; mostly they come out of it by themselves if disconnected for some time. I had several which came out of it after more than 2 hrs. So my advice is, leave it umpowered for the night, and test tomorrow.
Other than that you can try starting it up with a minimal config, so disconnect everything not needed to POST : HDD, CD, PCI cards, etc.
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by:jasonsandlin
ID: 12132760
i get no post at all. i have tried unplugging everything to get it to boot. still nothing. i will check it with a volt meter later on today.
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by:Iggy79
ID: 12133077
No problem just let me know what you get form that test and we will see what we can do.
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by:Callandor
ID: 12144243
A better test of a power supply is using a dedicated tester: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=561263

This will put a load on it and be able to tell if it can provide current to all rails.
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by:Iggy79
ID: 12161859
Just wanted to check up and see how it was going.  Did you get any results from the test?
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by:Iggy79
ID: 12254163
can you please let us know what is going on with this issue?
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by:jasonsandlin
ID: 12258016
i ordered a motherboard for it. that is what compaq is saying is the problem.
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ID: 12874404
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modulo
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by:leonardkm
ID: 12986048
I believe Iggy79 is on the right track... I have had the same problem with a Compaq Evo.  The original system displayed symptoms of a bad hard drive, so I replaced the drive.  Then I took the failed drive and installed it as a second drive on a second PC so I could try to pull files off of it.  When I powered the second PC up, I got the flashing red power light after a second.  When I removed the failed drive, the PC powered up correctly, so obviously the problem is with the bad drive.
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by:sumstew
ID: 14997222
So what exactly was the final verdict on this. I am getting bad PS, MOBO, and HD.
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