BIOS help

this is not something you can do. specially you don't know the machine well enough to go inside and fix it.
and, you can't reverse BIOS revision. upgrade only.
so if you installed a more updated version of BIOS. you have no other choice but to buy a new PC or go to ebay see if anybody have DV9000 BIOS or motherboard for sell. take that BIOS and install it on yours.
if you want to try to fix it yourself. you are on your own, I will not be responsible for your action.

First of all like you say you need to get hold of a good PC so you can get on the Internet. perferrablely a PC with CD burner and the software to burn with.
get on the interent adn go the vendors' web site and download the BIOS, usuall (.EXE) file. double click on the file and open it in a temperoary location on the harddrive. then burn it on to the cd. if the CD buner is capable, you might be able to burn it directly on tot he CD.

be extra carefull, what BIOS you download. D NOT RUN ANY BIOS SOFTWARE ON ANY MACHINE EXCEPT THE INTENTED MACHINE.