Manual

support.dell.com Checking the Equipment 5-3
Do the keyboard and its cable appear to be free of physical damage, and do the
keys work?
Ye s . Go to step 3.
No . Go to step 2.
2. Swap the faulty keyboard with a working keyboard. To swap a faulty keyboard,
unplug the keyboard cable from the system's back panel and plug in a working
keyboard.
Is the problem resolved?
Ye s . The keyboard must be replaced. See Chapter 9, “Getting Help,” for instruc-
tions on obtaining technical assistance.
No . Go to step 3.
3. Run the keyboard test in the Dell Diagnostics.
Can you use the keyboard to select the keyboard test?
Ye s . Go to step 5.
No . Go to step 4.
4. Swap the faulty keyboard with a working keyboard.
5. Did the keyboard test run successfully?
Ye s . The keyboard must be replaced. See Chapter 9, “Getting Help,” for instruc-
tions on obtaining technical assistance.
No . The keyboard controller on the system board is faulty. See Chapter 9, “Get-
ting Help,” for instructions on obtaining technical assistance.
Troubleshooting the Basic I/O Functions
This procedure determines whether the system's basic I/O functions are operational.
If a system error message indicates an I/O port problem or the device connected to
the port does not function properly, perform the following steps:
1. Enter the System Setup program and check the Serial Port 1 and Serial Port 2
settings.
Are the communications ports set to Enabled?
Ye s . Go to step 3.
No . Go to step 2.
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