IBM 7378 Problem Determination And Service Manual page 32

Table 3. Power-supply LEDs
AC power
Off
Off
Off
Off
On
On
On
On
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IBM System x3400 M3 Types 7378 and 7379: Problem Determination and Service Guide
Power-supply LEDs
DC power Power error
Off
Off
On
On
Off
Off or flashing
On
On
Description
Off No AC power to the server or a problem
with the AC power source
On No AC power to the server or a problem
with the AC power source and the power
supply has detected an internal problem
Off Faulty power supply
On Faulty power supply
Off Power supply not fully seated, faulty
system board, or faulty power supply
On Faulty power supply
Off Normal operation
On Power supply is faulty but still operational