System diagnostic leds – Acer Altos R720 Series User Manual
Page 32
1 System tour
22
System diagnostic LEDs
* For more information on how to troubleshoot during a system hang, refer to the
Diagnostic POST code table on page 149.
Item
Description
Item
Description
A
Diagnostic POST code
indicators*
E, F
CPU error indicator
B
System ID indicator
G
5-volt standby present
indicator
C
System status indicator
D
DIMM error indicator
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