Hp compaq will not boot, sticks at hp invent screen with F10

First - re-seat the hard disk and reboot the computer. If the computer does not boot up then reboot and go into the BIOS configuration to see if the BIOS detects the hard drive. If it doesn't detect the hard drive then it could be faulty.
Then the hard drive needs to be replaced in the computer/laptop, Windows installed and the computer or laptop's device drivers plus your programs etc. to get a functioning computer/laptop again.

The hard drive has issues, the next step is to have it tested for possible replacement.

If you are unable to "F-10" at power up, try 1}. unplug your laptop from AC adapter.
2}. press and hold power button until the computer powers up and powers off.
3} remove battery.
4). press and hold power button 10 seconds then release, replace battery.
5}. power up and press F10

If you are still unable to access BIOS you will need to obtain a system restore disk from HP

I am asuming this is when it is booting up?
Press F10 to go into bios
Reset default and try again.

Have you tried removing the memory 1 stick at a time?

press f10

mostly its because vga(Graphic) problem.
i can fix it if u want, u have to send me the mainboard.

change the mainboard... the bios is dead already

It sounds like an overheating problem. When it is booted, does it run ok other than just being slow? Check your cooling fan and make sure it is running and not stopped up. That is a number one symtom of overheating is freezing and rebooting by itself. Have you expierenced that problem also? There is a free program called "Motherboard Monitor 5" that will monitor the temp for you and set off an alarm when it is getting to hot. Check that problem first. Hopes this helps!

this is as if you haven't got an installed operating system and requires it to be installed, but you have to enable your cdrom as the first boot device. Put your O.S disc in and reboot; then press enter to boot up from disc.