Computer will not boot

Ornatus said:
I never said it was the psu, i said it could be, but it could be also the motherboard and hence why im asking here to see if any others have had similar experiences.
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Often. A suspect list that can create your symptoms is quite long. Other posters have listed a minority.

An answer without speculation means multimeter is the only way to obtain that answer in the next reply. Even PSU testers are useless.

Long before the CPU can execute, the power controller makes numerous decisions. Your post could be saying it reboots before the CPU is allowed to work. Or after. All those decisions, even long before the BIOS executes, is decided by the controller.

Of course, if the CPU does not execute, then CMOS is never read. First the controller makes many decisions. Then the CPU is allowed to execute. Then the CPU executes the BIOS. Then the BIOS reads CMOS. None of that happens if a power controller forbids it.

Remove all RAM and the video card. If the motherboard does not beep an error code, then the CPU is not even executing.
 
westom said:
Often. A suspect list that can create your symptoms is quite long. Other posters have listed a minority.

An answer without speculation means multimeter is the only way to obtain that answer in the next reply. Even PSU testers are useless.

Long before the CPU can execute, the power controller makes numerous decisions. Your post could be saying it reboots before the CPU is allowed to work. Or after. All those decisions, even long before the BIOS executes, is decided by the controller.

Of course, if the CPU does not execute, then CMOS is never read. First the controller makes many decisions. Then the CPU is allowed to execute. Then the CPU executes the BIOS. Then the BIOS reads CMOS. None of that happens if a power controller forbids it.

Remove all RAM and the video card. If the motherboard does not beep an error code, then the CPU is not even executing.
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Ive tried what you suggested and still nothing, fans dont spin the lights dont come on, the only spark of life is that the MB standby LED turns on but that happens when i plug the computer in, nothing happens at all when i press the power button now.
 
The fans would spin and light came on when the power button was pressed? All you did is unplug the computer to remove Ram and video card. Then connected the computer and pressed its power button. Nothing? Is that what you have said?

If that is what happened, then somthing else has also changed or moved. Again, with the meter, I could say specifically. Without such facts, I can only suggest (speculate) that you have moved or disconnected something. Or speculate on other possibilities. Removing Ram and Video card does not affect how the power controller monitors a power button.
 
westom said:
The fans would spin and light came on when the power button was pressed? All you did is unplug the computer to remove Ram and video card. Then connected the computer and pressed its power button. Nothing? Is that what you have said?

If that is what happened, then somthing else has also changed or moved. Again, with the meter, I could say specifically. Without such facts, I can only suggest (speculate) that you have moved or disconnected something. Or speculate on other possibilities. Removing Ram and Video card does not affect how the power controller monitors a power button.
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You are correct the fans and lights would come on and the cpu check led would flash on before crashing but since i tried removing the cmos battery and removing all but 1 stick of ram and then seeing if would boot as requested by a poster in this thread it will not even do that now, it seems to have made it worse, currently all it does with everything plugged in ie ram, video card is nothing at all when i press the power button, the only signs of life atm is when i plug in the power socket, the standby led light on the MB will light up and that is all. As ppl have posted i have tried to move all ram, all but 1 ram stick and the video card and still no signs of life apart from the standby led.
 
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