NCR 7601 - LED Diagnostic Indicators

2-34 Hardware Installation
LED Diagnostic Indicators
The two front panel LEDs also function as diagnostic indicators, defined as follows.
Note: The cell colors indicate the color of the LED at that particular time.
Current
System
Operation
Suspect
Component
System
State
Power LED
Disk
Activity
LED
Corrective Action
Normal
Operation
N/A System ON ON OFF N/A
Normal
Operation
N/A System ON
with HDD
Activity
ON Flashing
(HDD
Access)
N/A
Normal
Operation
N/A Unit in
Suspend (S3)
Blinking
(1/Sec)
ON N/A
• OFF
• AC Present
N/A • OFF
• Not in
Standby
• External
P/S ON
OFF ON N/A