IBM x3400 7975 Problem Determination And Service Manual page 56

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, System x3400 Types 7973, 7974, 7975 and 7976," on page 87 to determine
which components are customer replaceable units (CRU) and which components are field replaceable
units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Error code Description
I9990305 An operating system was not found.
I9990650 AC power has been restored.
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System x3400 Types 7973, 7974, 7975, and 7976: Problem Determination and Service Guide
Action
1. Make sure that a bootable operating system is
installed. To determine whether an operating
system is one of the devices in the startup
sequence, run the Configuration/Setup Utility
program (see the User's Guide on the IBM
System x3400 Documentation CD).
2. Run the hard disk drive diagnostic tests.
3. Reseat the following components, depending on
the server model:
v Hot-swap models:
a. Hard disk drive
b. Hard disk drive cable
c. Hard disk drive backplane
v Simple-swap models:
a. Hard disk drive
b. Hard disk drive cable
4. Replace the following components one at a time,
depending on the server model, in the order
shown, restarting the server each time:
v Hot-swap models:
a. Hard disk drive
b. Hard disk drive cable
c. Hard disk drive backplane
v Simple-swap models:
a. Hard disk drive
b. Hard disk drive cable
5. (Trained service technician only) Replace the
system board.
1. Reseat the power cords.
2. Check for interruption of the external power.
3. Replace the power cords.
4. For hot-swap models, replace the power supply
backplane.