In more cases this is mean that your PSU can`t fully power new (and more gluttonous) CPU. Change it (PSU) to more strong - 350W (is recommended for high-quality model) and higher (for low cost models).
Could be a BIOS problem (I'd bet on it)
Try holding down the 'insert' key and then restart computer. Unplug it if you need to first if its in the restart cycle where its restarting by itself. That will reset the BIOS and set it to motherboard default settings in many computers. Then get together the info Rumburak asked for so he can give you more defined help. Good Luck.
You need to provide more details. Did you keep your hard drive and just connected it to the new machine and powered it up? What mainboard, which operating system. And at what point of the boot process does it restart?
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You should be able to upgrade the CPU, since it seems that the DV1000's motherboard uses a socket CPU design. But, obviously, HP would rather have you choose the CPU that you want from the beginning and stick with it. The first thing to do is to check HP website to see what other configurations were/are sold for
your model. If they sell it with faster CPUs then you can upgrade to
one of them...
PLEASE NOTE: In order for a particular processor to be compatible with a particular laptop: (1) the processor must be physically compatible with the laptop socket, in your case I thing you have a Soket 479 processor (2) the laptop chipset must support the processor. (3) the chipset front side bus speed must match the processor front side bus speed, in your case 400Mhz. (4) the laptop BIOS must support the processor.
So I listed here processors with FSB at 400Mhz, I gues that DV1000 as a 855GM Motherboard that supports only 400Mhz with Socket 479
Banias Pentium M 1.3 1300 1024 400 Pentium M 1.4 1400 1024 400 Pentium M 1.5 1500 1024 400 Pentium M 1.6 1600 1024 400 Pentium M 1.7 1700 1024 400
Dothan Pentium M 710 1400 2048 400 Pentium M 715 1500 2048 400 Pentium M 725 1600 2048 400 Pentium M 735 1700 2048 400 Pentium M 745 1800 2048 400 Pentium M 755 2000 2048 400 Pentium M 765 2100 2048 400
Banias-512 Celeron M 310 1200 512 400 Celeron M 320 1300 512 400 Celeron M 330 1400 512 400 Celeron M 340 1500 512 400
Dothan-512 Celeron 205 1200 512 400
Dothan-1024 Celeron M 350 1300 1024 400 Celeron M 360 1400 1024 400 Celeron M 370 1500 1024 400 Celeron M 380 1600 1024 400 Celeron M 390 1700 1024 400
To upgrade from a Pentium 3 to a Pentium 4 processor, you would have to replace the motherboard. The Pentium 4 processor has more pins on it than the Pentium 3 and would not sit in a Pentium 3 motherboard.
what socket is the Pentium 3? Socket A. The sockets have to be compatible for example you can't upgrade a Dual Core for a Core 2 Duo because although the chipsets look the same the motherboard may not support the new instruction set. I had this problem recently as i wanted to upgrade my Intel Celeron D 3.02ghz to the Pentium Dual Core 1.8ghz and although the chips were identical and fitted perfectly in my mobo, the actual mobo i was using (foxconn) wouldnt work with it forcing me to buy an ASRock mobo and replace the entire system.