IBM System x3500 Service Manual page 124

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 x3500 Type 7977," on page 41 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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IBM System x3500 Type 7977: Problem Determination and Service Guide
Action
1. Make sure that a bootable operating system is
installed.
2. Run the hard disk drive diagnostic tests.
3. Reseat the following components:
a. Hard disk drive
b. SAS hard disk drive backplane and cables
c. DVD drive and cables
4. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. Hard disk drive
b. SAS hard disk drive backplane and cables
c. DVD drive and cables
d. (Trained service technician only) System
board
1. Check the power cables.
2. Check for interruption of the power supply (see
"Power-supply LEDs" on page 137).
3. Reseat the following components:
a. Power supply
b. (Trained service technician only) Power
backplane
4. Replace the components listed in step 3, one at a
time, in the order shown, restarting the server
each time.