Dell 420, 220S manual System Messages, Hardware Troubleshooter, Click Start→ Help and Support

2	No memory modules are	• If two or more memory modules are installed, remove the modules (see Replacing or Adding a Memory
	detected.	Module), and then reinstall one module and restart the computer. If the computer starts normally,
		continue to install additional memory modules (one at a time) until you have identified a faulty module or
		reinstalled all modules without error.
		• If available, install working memory of the same type into your computer (see Replacing or Adding a
		Memory Module).
		• If the problem persists, contact Dell (see Contacting Dell).
3	Possible system board	Contact Dell (see Contacting Dell).
	failure.
4	RAM Read/Write failure.	• Ensure that no special requirements for memory module/connector placement exist (see Replacing or
		Adding a Memory Module).
		• Ensure that the memory you are using is supported by your computer.
		• If the problem persists, contact Dell (see Contacting Dell).
5	Real time clock failure.	• Replace the battery (see Coin-Cell Battery).
	Possible battery or	• If the problem persists, contact Dell (see Contacting Dell).
	system board failure.
6	Video BIOS Test Failure.	Contact Dell (see Contacting Dell).

System Messages

NOTE: If the message you received is not listed in the table, see the documentation for either the operating system or the program that was running when the message appeared.

Alert! Previous attempts at booting this system have failed at checkpoint [nnnn]. For help in resolving this problem, please note this checkpoint and contact Dell Technical Support — The computer failed to complete the boot routine three consecutive times for the same error (see Contacting Dell).

CMOS checksum error — Possible system board failure or RTC battery low. Replace the battery (see Replacing the Coin-Cell Battery).

CPU fan failure — Processor heat sink/fan failure. Replace the heat sink/fan assembly (see Processor Heat Sink/Fan Assembly).

Hard-disk read failure — Possible hard drive failure during hard drive boot test.

Keyboard failure — Keyboard failure or keyboard cable loose (see Keyboard Problems).

No boot device available — The system cannot detect a bootable device or partition.

¡If the hard drive is your boot device, ensure that the cables are connected and that the drive is installed properly and partitioned as a boot device.

¡Enter the system setup program (see System Setup Program) and ensure that the boot sequence information is correct.

No timer tick interrupt — A chip on the system board might be malfunctioning or system board failure (see System Setup Program for assistance).

NOTICE – Hard Drive SELF MONITORING SYSTEM has reported that a parameter has exceeded its normal operating range. Dell recommends that you back up your data regularly. A parameter out of range may or may not indicate a potential hard drive problem. —

S.M.A.R.T error, possible hard drive failure. This feature can be enabled or disabled in BIOS setup.

Hardware Troubleshooter

If a device is either not detected during the operating system setup or is detected, but incorrectly configured, you can use the Hardware Troubleshooter to resolve the incompatibility.

Windows® XP:

1.Click Start→ Help and Support.

2.Type hardware troubleshooter in the search field and press <Enter> to start the search.

3.In the Fix a Problem section, click Hardware Troubleshooter.