Try plugging in a monitor (VDU) to each of the laptops and see if they work (may need to start in safe mode if the monitor will not display at high enough resolution).
Also try starting both laptops in safe mode without monitor connected - you should at least see the bios messages.
Check HP.com for more help - you can at least download the service manuals for your machines.
Good luck
mark
December 2006
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