Dell 4500 technical specifications Using System Restore, Creating a Restore Point

Message	Possible Cause	Corrective Action
8042 Gate-A20 error	The keyboard controller failed its test.	If you receive this message after making changes in the system setup
		program, enter the program and restore the original value(s).
Address Line Short!	Error in the address decoding circuitry in the	Reseat the memory modules.
	memory.
C: Drive Error	The hard drive is not working or is not configured	Ensure that the drive is installed correctly in the computer and defined
	correctly.	correctly in the system setup program.
C: Drive Failure
Cache Memory Bad, Do	Cache memory is not operating.	See "Contacting Dell" in the Dell Owner's Manual for instructions on obtaining
Not Enable Cache		technical assistance.
CH-2 Timer Error	An error is occurring on the timer on the system	See "Contacting Dell" in the Dell Owner's Manual for instructions on obtaining
	board.	technical assistance.
CMOS Battery State	The system configuration information in the system	Enter the system setup program and verify the system configuration; then
Low	setup program is incorrect, or the battery charge	restart the computer.
	may be low.
CMOS Checksum Failure
CMOS System Options
Not Set
CMOS Display Type
Mismatch
CMOS Memory Size
Mismatch
CMOS Time and Date
Not Set
Diskette Boot Failure	Drive A or B is present but has failed the BIOS POST.	Ensure that the drive is installed correctly in the computer and defined
		correctly in the system setup program. Check the interface cable at both
		ends.
DMA Error	Error in the DMA controller on the system board.	The keyboard or system board may need to be replaced.
DMA 1 Error
DMA 2 Error
FDD Controller	BIOS cannot communicate with the floppy drive or	Ensure that the floppy drive or the hard drive is installed correctly in the
Failure	hard drive controller.	computer and defined correctly in the system setup program. Check the
		interface cable at both ends.
HDD Controller
Failure
INTR1 Error	Interrupt channel on the system board failed to	The keyboard or system board may need to be replaced.
	POST.
INTR2 Error
Invalid Boot Diskette	The operating system cannot be located on drive A	Enter the system setup program and confirm that drive A or drive C is
	or drive C.	properly identified.
Keyboard Error	The BIOS has detected a stuck key.	Make sure that nothing is resting on the keyboard; if a key appears to be
		stuck, carefully pry it up. If the problem persists, you may need to replace
		the keyboard.
KB/Interface Error	An error occurred with the keyboard connector.	Make sure that nothing is resting on the keyboard; if a key appears to be
		stuck, carefully pry it up. If the problem persists, you may need to replace
		the keyboard.
No ROM Basic	The operating system cannot be located on drive A	Enter the system setup program and confirm that drive A or drive C is
	or drive C.	properly identified.

Using System Restore

The Microsoft® Windows® XP operating system provides System Restore to allow you to return your computer to an earlier operating state (without affecting data files) if changes to the hardware, software, or other system settings have left the computer in an undesirable operating state. See Windows Help for information on using System Restore. To access Windows Help, see "Finding Help Information."

NOTICE: Make regular backups of your data files. System Restore does not monitor your data files or recover them.

Creating a Restore Point

1.Click the Start button.

2.Click Help and Support.

3.Click System Restore.

4.Follow the instructions on the screen.

Restoring the Computer to an Earlier Operating State

If problems occur after installing a device driver, first try using Device Driver Rollback. If that is unsuccessful, then use System Restore.