flash bios/cmos data for 1100

Question

i had a dell inspiron 1100 with celeron 2.3 b4 and i replace the cpu with a p4m 1.6. testing show it run at 1.2 and it work fine most of the time(crush IE from time to time but mozilla seems ok).

lately i try to install a external security key(usb-like). but it fail with suggestion 'trying with a more stable system). so i put the old celeron 2.3 cpu back but fail to boot with no display at all. but when i put the p4m 1.6 back, it came right up with no problem(bios show p4m 1.2 as cpu).

i was told i need a bootable bios upgrade cd and boot with the cd and then flash the bios/cmos to default or discharge the cmos battery b4 put the celeron cpu back.

any comment are welcome thanks

ejn63 · Answer

The 1100 won't run a Pentium 4 m at full speed; it is designed for desktop CPUs.

It sounds like the 2.3 is overheating - be sure the fans and heatsink are clear of dust and that thermal compound is properly applied to the core of the CPU.

kylnj · Answer

hi ejn, thanks for reply. you are right it has a 478 socket, i remembered the fan kick in quite often for hi-cpu processes. and after i put the p4m, it does improve a bit(but i am not sure about that because i did expend the memory to 640mb as well). it seems now the laptop only run with p4m on it. well can you tell me how to get it to run on a celeron again(like what i had before, or can you verify the procedure)? when i put the celeron back (with the p4m info in bios) and fire it up, the power led is on steadly but the led for HD blink once and nothing happen(no display, no fan spin... just hang there and never even start--i dont see a chance of overheating). thanks Message Edited by kylnj on 12-08-2007 05:57 PM

Message Edited by kylnj on 12-08-2007 06:01 PM

kylnj · Answer

what i am thinking of is: with the p4m cpu, fire up into bootable bios upgrade cd prompt, clean bios info, save change and reboot. i have to shut the power while it is exiting(after saving the change, but b4 the system pick up the p4m cpu info and store into bios/cmos again), do you see any chance of screwing up? if not, i will put the celeron back and boot.

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flash bios/cmos data for 1100

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