Boot problem

I am rebuilding my old computer, I am moving parts from my sister's almost 10 year old computer. Over to my 766mhz hp pavilion 7840. I replaced the hard drive which was orginally 30 gig, and put the 120 gig western digital hard drive in its place. The only thing I really moved from my sister's old computer is the cd-rom. I did move a ethernet card over, but kept getting operating system not found. So I took it out, the computer has no cards just a motherboard,cd-rom,hard drive,along with a power source.

My problem seems to be either two things

1. my keyboard locks up on me telling me to unlock it but have no clue how to do that. 0213 i believe the code is

2. I get by the much aggrvating keyboard lock, but the screen turns completly blank I hear a beep and thats it.

I can't even use the cd-rom to load any sort of programs

The keyboard I use is a multimedia GE keyboard just bought it

Please help me out I am getting rather aggrvated

Scott

If your machine is set to autoboot, it will not give you the BOOT> prompt. Instead, it will try to find a device that it can go to the next stage with (the ISL). To stop the autoboot, hit the ESC key. If your HP does not present you with the option of aborting the autoboot, then your machine is in Secure Mode, causing the 0213 problem as well as the other problems you are experiencing. To unset secure mode, you need to unplug all bootable devices (this include the network, all harddrives, tapes, and CDROMs). Once you get the BOOT prompt, type secure off. You can then power off your machine and plug everything back in.

This normally works, good luck.

I tried that now I get operating system not found

I hit escape and I get a menu saying where I want to boot off of

cd rom
hard drive
network
removable drives

I have unplugged everything, except the power going to the motherboard. I get a lot of beeps as well