IBM 7985 Problem Determination And Service Manual page 54

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 4, "Parts listing, System x3655, Type 7985 and 7943," on page 93 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
19990305 An operating system was not found.
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IBM System x3655 Type 7985 and 7943: Problem Determination and Service Guide
Action
1. Make sure that a bootable operating system is
installed.
2. Run the hard disk drive diagnostic test.
3. Reseat the hard disk drive.
4. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. Hard disk drive
b. (Trained service technician only) System
board