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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, TD100 Types 6398, 6399, 6419, 6429, 4203, and 4206,” on page 25 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 Action
I9990301 Hard disk drive boot sector error.
1. Reseat the following components, depending on
the server model:
v Hot-swap and non-hot-swap models:
a. Hard disk drive
b. Hard disk drive cable
c. Optional adapter cable
d. SAS/SATA backplane
v Simple-swap models:
a. Hard disk drive
b. Hard disk drive cable
c. Optional adapter cable
d. SATA backplate
2. 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 and non-hot-swap models:
a. Hard disk drive
b. Hard disk drive cable
c. Optional adapter cable
d. SAS/SATA backplane
v Simple-swap models:
a. Hard disk drive
b. Hard disk drive cable
c. Optional adapter cable
d. SATA backplate
3. (Trained service technician only) Replace the
system board.
168 ThinkServer TD100 and TD100x: Hardware Maintenance Manual