IBM System x3650 M3 4255 Service Manual page 70

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, Types 4255, 7945, and 7949 server," on page 157 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.
v Go to the IBM support Web site at http://www.ibm.com/systems/support/ to check for technical
information, hints, tips, and new device drivers or to submit a request for information.
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.
52
IBM System x3650 M3 Types 4255, 7945, and 7949: 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. The IMM remote presence function is disabled if you install an optional video
adapter. To use the IMM remote presence function, remove the optional video
adapter.
3. Make sure that:
v The server is turned on. If there is no power to the server, see "Power
problems" on page 55.
v The monitor cables are connected correctly.
v The monitor is turned on and the brightness and contrast controls are
adjusted correctly.
4. Make sure that the correct server is controlling the monitor, if applicable.
5. Make sure that damaged server firmware is not affecting the video; see
"Recovering the server firmware" on page 109 for information about recovering
from server firmware failure.
6. Observe the checkpoint LEDs on the light path diagnostics panel; if the codes
are changing, go to the next step.
7. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Monitor
b. Video adapter (if one is installed)
c. (Trained service technician only) System board
8. See "Solving undetermined problems" on page 154 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 72).
v If the server passes the video diagnostics, the video is good; see "Solving
undetermined problems" on page 154 for information about solving
undetermined problems.
v If the server fails the video diagnostics, (trained service technician only)
replace the system board.