P6F104 User’s Manual
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5 Debug & Troubleshooting
5.1 Debug LED (Optional)
The P6F104 mainboard comes with a unique debug LED design to
help system integrator to catch up the problem right away.
There are three debug LED close to the front panel connector LED1
LED2, LED3. The LED1 is a GREEN color and LED2 and LED3 is
RED. The table below will help you to trouble-shooting the problem
before video is available.
Debug LED Table
Note: The VCC33SBY LED indicates power status of system memory. When the
LED3 turn on which means system memory use 3.3V standby power. When LED3
is off system memory use 3.3V power. For safety, it is necessary to turn off power
supply’s switch whenever replace DIMM module.
Possible Problem
LED1 LED2
CPU (not install) or
mainboard fail
ON
OFF
memory fail
Blink
ON
Video fail
OFF
ON
Normal (no problem) OFF
OFF
Chapter 5: Debug & Troubleshooting
LED1
LED2
(green)
(red)
Front Panel Connector
VCC33SBY
(Red)