NCR 7607 - Page 88

4-78 Diagnostics
Current
System
Operation
Suspect
Component/
Failure
Terminal
State
Disk
Activity
LED
Power LED Debug Path
Normal
Operation
N/A System ON OFF
ON N/A
Normal
Operation
N/A System ON
with HDD
Activity
Flashing
(HDD
Access)
ON N/A
Normal
Operation
N/A Unit in
Suspend (S3)
ON Blinking (1/Sec) N/A
OFF with
AC
Present
N/A OFF Not in
Standby
External
power
supply ON
ON OFF N/A
OFF
AC
Present
Power System OFF
Not in
Standby
External
power
supply ON
OFF OFF • Check AC power to
power supply.
• Check Power supply.
• Check connection
between unit and power
supply.
• Check power connection
from connector panel to
motherboard and
motherboard to LED
panel.
• Replace power supply.
• Replace motherboard.
• Replace front panel
board.
Runtime Cooling
Component/CPU
Over
Temperature
N/A Flashes
red/green, then
solid red as
temperature
increases
• Check for blocked
cooling Vents.
• Check for fan failure.
• Check for excessive
ambient temperature.
• Check cooling solution.