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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, Type 7942 server," on page 37 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.
Symptom
The screen is blank.
The monitor works when you
turn on the server, but the
screen goes blank when you
start some application
programs.
The monitor has screen jitter, or
the screen image is wavy,
unreadable, rolling, or distorted.
100
IBM System x3610 Type 7942: Problem Determination and Service Guide
Action
1. If the server is attached to a KVM switch, bypass the KVM switch to eliminate it
as a possible cause of the problem: connect the monitor cable directly to the
correct connector on the rear of the server.
2. Make sure that:
v The server is turned on. If there is no power to the server, see "Power
problems" on page 102.
v The monitor cables are connected correctly.
v The monitor is turned on and the brightness and contrast controls are
adjusted correctly.
v No beep codes sound when the server is turned on.
3. Make sure that the correct server is controlling the monitor, if applicable.
4. Make sure that damaged BIOS code is not affecting the video; see "Recovering
the BIOS code" on page 107 for information about recovering from a BIOS
failure.
5. See "Solving undetermined problems" on page 110 for information about
solving undetermined problems.
1. Make sure that:
v The application program is not setting a display mode that is higher than the
capability of the monitor.
v You installed the necessary device drivers for the application.
2. Run video diagnostics (see "Running the diagnostic programs" on page 105).
If the server passes the video diagnostics, the video is good; see "Solving
undetermined problems" on page 110 for information about solving
undetermined problems.
1. If the monitor self-tests show that the monitor is working correctly, consider the
location of the monitor. Magnetic fields around other devices (such as
transformers, appliances, fluorescent lights, and other monitors) can cause
screen jitter or wavy, unreadable, rolling, or distorted screen images. If this
happens, turn off the monitor.
Attention:
Moving a color monitor while it is turned on might cause screen
discoloration.
Move the device and the monitor at least 305 mm (12 in.) apart, and turn on
the monitor.
Notes:
a. To prevent diskette drive read/write errors, make sure that the distance
between the monitor and any external diskette drive is at least 76 mm (3
in.).
b. Non-IBM monitor cables might cause unpredictable problems.
2. Reseat the monitor cable.
3. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Monitor cable
b. Monitor
c. (Trained service technician only) System board
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