My compaq presario wontboot and when I hit F6 it says ******* opcode executed?

replace the motherboard.

try ti hit FN+F6

Drivers and software you can find here. Just choose Operating System and press Next

Each model are not exactly the same, it is combination keys, Fn and either F4, F5, F6, F7, or F8.

That is for Key Lock. Go ahead and press fn +F6 and then open notepad and see what happens. Some of your keys won't work and some will type in other letters than the one you pushed.

XP does not include SATA drivers in the distribution. You need to get the SATA drivers for your particular model from HP's website and watch for the prompt to hit F6 when prompted to install SATA or RAID drivers.

The trick is that the mechanism to add these drivers at this point assumes that you have a floppy drive which is rare these days. There are a number of work-arounds for this, here is one:

http://news.softpedia.com/news/Install-Windows-XP-On-SATA-Without-a-Floppy-F6-47807.shtml

Hit ctrl-alt and up arrow.

the reason you probably cant install is because your probably trying to install windows XP on a sata hard drive.. xp doesnt contain sata hard drive drivers.. u either have to use vista, find the sata controller drivera nd load from floppy by hitting F6 during setup.. or have someone slipstream the drivers into a copy of xp.. try emailing [email protected] as I know they can help

my compaq presario 5000 desktop will start and get stuck on the compaq logo screen with a cursor in the right hand corner.I try pressing F6 and it won't do anything.I tried other keys and it does nothing.Apparently my granddaughter told me ther was a message came up sayinf computer is locking up.Any help will be appreciated.
Barb

Since u said that ur screen flashed and also u said that when u connected an external VGA nothing would display so from these two i can tell you that it is a hardware problem and that too with the VGA card/display card.

Thankyou