IBM System x3755 Problem Determination And Service Manual page 94

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 x3755 Type 8877 and 7163," 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.
Beep code Description
3-1-2 Interval timer channel 2 failed.
3-1-3 RAM test failed above address
0FFFFh.
3-1-4 Time-of-day clock failed.
3-2-1 Serial port failed.
78
IBM System x3755 Type 8877 and 7163: Problem Determination and Service Guide
Action
(Trained service technician only) Replace the I/O board, see
"Removing the I/O board assembly" on page 68 and
"Replacing the I/O board assembly" on page 69.
1. Reseat the microprocessor/memory cards, see "Removing
a microprocessor/memory card" on page 51 and
"Replacing a microprocessor/memory card" on page 51.
2. Reseat the DIMMs, see "Removing a DIMM" on page 48
and "Replacing a DIMM" on page 49.
3. Replace the following components one at a time, in the
order shown, restarting the server each time:
a. DIMMs, see "Removing a DIMM" on page 48 and
"Replacing a DIMM" on page 49.
b. Microprocessor/memory card 4, 3, 2; then, 1. See
"Removing a microprocessor/memory card" on page
51 and "Replacing a microprocessor/memory card" on
page 51.
c. (Trained service technician only) I/O board. See
"Removing the I/O board assembly" on page 68 and
"Replacing the I/O board assembly" on page 69.
1. Reseat the battery. See "Removing the battery" on page
53 and "Replacing the battery" on page 54.
2. Replace the following components one at a time, in the
order shown, restarting the server each time:
a. Battery. See "Removing the battery" on page 53 and
"Replacing the battery" on page 54.
b. (Trained service technician only) I/O board. see
"Removing the I/O board assembly" on page 68 and
"Replacing the I/O board assembly" on page 69.
(Trained service technician only) Replace the I/O board, see
"Removing the I/O board assembly" on page 68 and
"Replacing the I/O board assembly" on page 69.