No boot up

I have a Dell Inspiron 8600 laptop that wont start up. When you press the power key the power light comes on and thats all it will do. The screen remains totally black and there is no sign of any activity.The power supply seems to be ok.I tried disconnecting all periferals and I also tried to start it up with a start up disk.I also drained the BIOS.It will spin the start up disk for a few moments and then stop.
ginchoAsked:
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nobusConnect With a Mentor Commented:
then  you have a bad mobo, or cpu - sorry . . .
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PUNKYCommented:
Try reseat hard drive and memory first see if it helps.
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dekkarCommented:
could be the ram..... or even the screen.. when you turn on the laptop.... does the hdd light flash, like the machine is working? just no display?
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nobusCommented:
does it beep if you boot without ram?  if not you may have a dead mobo, or cpu
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nobusCommented:
...and test also with battery alone, and from AC alone
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ginchoAuthor Commented:
If you try to boot without ram there are no beeps. The power light comes on for a few seconds and then goes off again. The result is the same with battery alone or power supply alone. The power supply is a known good one.
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MoatazGadCommented:
Maybe it's the BIOS, since it reads diskette, go to http://www.uniflash.org, download UniFlash, download the appropriate BIOS image for your laptop, follow Uniflash's manual instructions to create automated flashing bootable disk, and try flashing your BIOS.

Good Luck
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