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PC will not boot most of the time


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When I press the start button, the lights (switch and logo)and fans are working continually, the DVD drive light flashes for 2 seconds, the LED for the system lights up for about 3-5 seconds and then fails to go any further (no flashing lights). The fans work continuously. It just doesnt go to the boot process.

After I have switched on and off many times then sometimes the system boots up and it would work. Once switched off, I have to go through the same process. When the system works, it works flawlessly without any problems whatsoever.

I have changed the bios battery, tried to update the bios but I had the latest version, removed the cables to DVD and the hard drives. removed the 2 memory sticks and tried them with various combinations. checked for viruses.

The motherboard is 18months old.

Any help would be appreciated. Thanks

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Chronus yes that is the one thanks.

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