there is no video card, this is not a desktop (cept my elite book)
your GPU is solder down chip, if its 2008 PC, then it has the solder balls failure. Nvidia failure. is this 2008 PC>? the service guide says 2007 ,so is 10 year old or 9 and has bad GPU chip, as most did.
in DOG years its, 100 years old.... few ever last this long....
this thing is old its not new,
all old laptops are trash, this old, they are like dog years.
no OS stated
, so cant help much. lacking that key fact.
is it still running the original XP day1 new? or did you upgrade the OS and if not done right many things will fail, even wifi and video.
what wireless card? is it HP, card? USB card, where did you plug in said card (mini-pci slot inside?) yes i see it in the parts list.
they can go bad but I bet the driver was and is wrong.
the driver must match prefectly and these card that is tricky.
there were many models of cards made. so, yah,
i have special software scanner I use to ID all cards and all chips.
then i can match anything made.
The 9200 is now legacy, at HP , retired and no support this old.
It came with XP new, is that what it is now?
The drivers for all the cards and chips are not at HP now.
so getting all that to work right takes hard work.
here are the black screen steps, are you ready.
remove that old main battery they short, leave it out until its fixed.
power on, does no power on , and fan blows>?
are the vents clear of lint so it wont overheat.
does the HDD spin , heard.
any text on the screen ever.?
if you use a flash light to screen can you see data"?
if you torque the base gently or push ******* the J key
does the screen wake up?
I think its solder balls from hell. but ID have to strip it down
and do tests to prove that.
here is your serv. manual, (site search magic)
here is the solder ball deal. 2007 to 2009