Monitor Or Video Problems - IBM 7870B4U Service Manual

Monitor or video problems

Use this information to diagnose and resolve monitor or video errors.
Follow the suggested actions in the order in which they are listed in the Action
column until the problem is solved.
The video monitor is a shared BladeCenter unit resource. First, make sure that the
video monitor is assigned to the blade server; then, see the following table and
"Solving shared BladeCenter resource problems" on page 227.
v See Chapter 4, "Parts listing," on page 41 to determine which components are CRUs and which components
are FRUs.
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Symptom
The screen is blank.
The monitor has screen jitter, or
the screen image is wavy,
unreadable, rolling, or
distorted.
Wrong characters appear on the
screen.
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BladeCenter HS22 Type 7870, 1936, and 1911: Problem Determination and Service Guide
Action
1. Check the function of the shared BladeCenter unit resources (see "Solving
shared BladeCenter resource problems" on page 227).
2. Make sure that the blade server is turned on (see "Turning on the blade
server" on page 14).
3. Make sure that the monitor is connected properly. See the documentation for
your BladeCenter unit for more information.
4. Make sure that:
v Damaged BIOS code is not affecting the video; see "Recovering from a UEFI
update failure" on page 223.
v The device drivers are installed correctly.
5. Follow the UEFI recovery procedure in "Recovering from a UEFI update
failure" on page 223).
6. (Trained service technician only) Replace the system-board assembly (see
"Removing the system-board assembly" on page 97 and "Installing the
system-board assembly" on page 98).
1. Check the function of the shared BladeCenter unit resources (see "Solving
shared BladeCenter resource problems" on page 227).
2. (Trained service technician only) Replace the system-board assembly (see
"Removing the system-board assembly" on page 97 and "Installing the
system-board assembly" on page 98).
1. If the wrong language is displayed, update the firmware or operating system
with the correct language in the blade server that has ownership of the
monitor.
2. Check the function of the shared BladeCenter unit resources (see "Solving
shared BladeCenter resource problems" on page 227).
3. (Trained service technician only) Replace the system-board assembly (see
"Removing the system-board assembly" on page 97 and "Installing the
system-board assembly" on page 98).