Getting Started 2–11
Basic Troubleshooting
Yellow or Green
Power LED
flashes every
second (on select
models.)
None System memory error. 1. Check memory module
(see the relevant section
of the
Hardware
Reference Guide
).
2. Remove and reseat
memory module.
3. See the “Solving Memory
Problems” section in the
Troubleshooting
guide.
Red or Yellow
Power LED On.
None Processor unseated. Reseat processor in system
board.
Red or Yellow
Power LED is:
1. Flashing four
times per
second, OR
2. Flashing two
times one
second apart,
followed by a
two second
pause, OR
3. Not flashing.
None Computer overheated. 1. Install computer cover or
access panel if necessary.
2. Ensure that computer air
vents are not blocked and
internal fan is running.
Diagnostic Keyboard LEDS, Front Panel LEDs and Audible Codes
(Continued)
Activity Beeps Probable Cause Recommended Action