Motherboard LED Amber-coloured

I have a problem. Whenever power is connected to the computer, it starts for itself, the motherboard led shows solid orange, the power led also shows solid orange, and it cuts out after 5 seconds or so. No monitor activity. Then, a second after it shuts off, it powers on by itself, and the cycle goes on till I remove the power cord. When I unplug the 4-pin cpu power plug from the board, while leaving in the main 24-pin motherboard power plug, the computer powers on, fans spin at high speed, and it doesn't cut out. Both the motherboard led and power button led remain amber. I've tried switching out the PSU, RAM, jumpers for bios, and changing the processor. Nothing worked. Any Ideas? Thanks.
mavcomAsked:
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adriaanvwCommented:
I would suggest replacing the motherboard!

However, some other items that could cause this issue are:

1. Incorrectly wired chassis cables (on-off, power LED, HD LED, etc.)
2. Insufficient power supply (e.g. if you have a very power hungry graphics card)
3. Incorrectly seated RAM
4. Corrupt BIOS

If all of the other components check out OK, then you are most likely just looking at a busted motherboard though.
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Michael MachieIT SupervisorCommented:
Sounds like a short in the Mainboard somewhere. The lights should be green as you are aware. The behavior of turning itself on is not uncommon in some DELLs and Gateway machines, for whatever reason, but even if it is one of those models, if it did not do that in the past then you now have an issue.

I would start by checking the RAM too, but it does seem to me like the MB is shorting out...
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mavcomAuthor Commented:
The problem started when I tested a processor from a machine that was problematic, into this one, to see whether the other MB was bad, or if it was the processor. It detected the processor in the bios, so I switched off and put back the original processor. There is where the problem started.
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Michael MachieIT SupervisorCommented:
It is very possible, regardless of how careful you are, that you touched a capacitor near the processor while removing the CPU. The static from your fingers could easily burn out a capacitor and cause the problems you are experiencing, even if you did not directly touch it - sometimes getting close can cause the static to jump over and burn out the capacitor.

Question - is this an AMD, or worse Citrix, CPU? A Gateway PC specifically? I only ask because I have worked at a place that sold only AMD processors and would do just what you did to test MBs and CPUs. However, when they powered on the machine after moving a CPU, the CPU would burn out within 30 seconds because the Tech did not install a fan, thermal paste or a heatsink. AMDs are notorious for getting superheated super fast and without proper cooling can burn out in an instant.

That timing would be about right for loading the BIOs to check the CPU and then powering the machine off.
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mavcomAuthor Commented:
The original processor was an Intel Core 2 Quad, and I tested an Intel Dual-Core in it. When I put back in the Core 2 Quad, the problem started. I even tested an Intel Core 2 Duo, which was practically new, in it afterwards to see if somehow the Quad went bad as well. I installed the heatsink and fan, and used some thermal paste on it. I even discharged the board using the method of pressing and holding the power button for 20-30 seconds. Its still looping, with amber lights on motherboard and power LED.
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Michael MachieIT SupervisorCommented:
Do you get the same behavior when the CPU is removed and the board is powered on with nothing in the socket?
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mavcomAuthor Commented:
Yes. Tried that, same problem.
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Michael MachieIT SupervisorCommented:
The MB is def toast then. No CPU in the socket on a working MB would show different signs such as a cursor on a blank screen or a series of beeps.

I know it is a tough answer considering it was working, but I have seen too many instances were this has happened. Discharging the board is always good to do, but you still always need to discharge yourself too.
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nobusCommented:
since it started after replacing cpu's - it looks like you may have bent the cpu contacts
i suggest to open up the system, and remove the cpu, and inspect the contacts for bent ones

i had this, and was able to rectify the problem
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mavcomAuthor Commented:
775 CPU contacts are on the MB
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nobusCommented:
i know - they'r in the socket - are they bent, or not?
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Michael MachieIT SupervisorCommented:
If they are bent the cpu would not fit in the socket properly and you could not close the cpu lock.
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nobusCommented:
maybe one broke off?  check carefully
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mavcomAuthor Commented:
CPU sockets were not bent. Remember that it was two different boards.
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Michael MachieIT SupervisorCommented:
I am still curious as to what the issue was. Did swapping the MB fix the issie, or swapping the CPU again? Thanks for the points but my main concern is getting you up and running.
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