Checkpoint [ krst ]

Isn't that a Radio Station? If So, Its on Wikipedia

I have looked at a Dell forum and the information given by dell is to replace the motherboard as the BIOS has become corrupt. The BIOS recovery is not available with this failure. Sorry.

Computer VGA (Vidoe Graphics Adapter) is stuck in low definition mode

Try F12 or ESC or Del. Google search the error message by Make and Model of desktop.

go into bios and disable usb ports it should tell you while its booting up what key to press to get there like f1 or f2

Try running the Check Disk Utility.

To run the check disk utility you will need a repair disc ora operating system disc. Put the disc in the cd drive and boot fromit. You want to get to the Dos Command Prompt (Black screen with whiteletters) and type the following command: chkdsk /r
Check disk will run well over an hour or two and you will notice thepercentages going from high to low, this is normal. Let it run tocompletion. Then reboot machine.

If check disk fails to solve your problem you might have to reinstall windows.Try doing a Repair Install that way you don't loose your data, documents,music, pictures, videos or programs.

In windows xp you get to the dos command prompt by selecting R for repair whenthe options appear.

In Vista and Windows 7 you want to get to the recoveryconsole and look down at the bottom of the window for the Dos Command.

test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them they could be faulty

make sure all leads that are attached to your drives dvd\cd have secure connections and are not faulty or just replace them they could be faulty ?

make sure the CPU central processing unit has thermal grease and a dust free secure seating

even something as small as an electrical extension or a faulty fan lead can cause this problem follow the troubleshooting procedure a computer needs all of the data and electrical current to travel through every working device and to have an end for a computer to be able work properly

motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive check all electrical extensions make sure they are securely seated even the cd/dvd drives need to have current go through make sure these devices are working

the beep might be ram check your computer ram and cmos battery to make sure they are securely seated and the battery has plenty of charge
some motherboards cmos batteries are soldered in
hope this helps

If you made a backup disc use that disc and run the repair files options when you boot up your computer. Sound like one of the files got corrupted on hard drive.

Try booting in safe mode. Then boot normally.

Open up the case and remove any add in cards and memory modules. Try to start up by adding these back one at a time until the unit stops booting normally. The light combination is not one recognised in the user manual so I am guessing you have a non-descript fault with one of your components. Be careful when you open the case as to not disturb the ribbon to the motherboard which controls the power, I have had a very long experience trying to get one of these reconnected!