Service Reference Guide

Service Reference Guide F–3
Troubleshooting Without Diagnostics
Computer does not boot up and Num
Lock LED is blinking; you may hear one
short and two long beeps.
Memory may be improperly installed or may be bad.
The Caps Lock LED is flashing; you may
hear one long and two short beeps.
The video controller is not present or is incorrectly initialized.
Clear configuration memory (CMOS). If a video card has
been added, remove and reseat it.
Computer does not boot up and the
Scroll Lock LED is flashing; you may
hear two long and one short beeps.
System board hardware failure (prior to video). Replace
system board.
✎
If the standard keyboard has been replaced with a Universal Serial Bus (USB) keyboard, you will hear
the beep sequences mentioned above but will not see the flashing lights.
Solving Minor Problems (Continued)
Problem Possible Solution
Diskette Drive
Problem Possible Solution
Diskette drive light stays on. 1. Diskette is damaged. In Windows 98, 2000, or Me run
ScanDisk. Click Start > Programs > Accessories >
System Tools > ScanDisk.
In Windows NT, right–click Start, click Explore, and
select a drive. Select File > Properties > Tools. Under
Error-checking, click Check Now.
2. Diskette is incorrectly inserted. Remove the diskette and
reinsert.
3. Software program may be damaged. Check the
program diskettes.
4. Drive button is not pushed in. Push in drive button.
5. Drive cable is not properly connected. Reconnect drive
cable.
Diskette drive cannot write to a
diskette.
1. Diskette is not formatted. Format the diskette.
2. Diskette is write-protected. Either use another diskette
that is not write-protected or disable the write protection
on the diskette.
3. Writing to the wrong drive. Check the drive letter in the
path statement.
4. Not enough space is left on the diskette. Use another
diskette.
5. Diskette write control is enabled. Check the Removable
Media write settings in Computer Setup.
Cannot format diskette. Invalid media reported. When formatting a diskette in DOS,
you may need to specify diskette capacity. For example, to
format a 1.44-MB diskette, type the following command at
the DOS prompt:
FORMAT A: /F:1440