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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 the parts listing in the Problem Determination and Service Guide 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
Testing the monitor
The screen is blank.
The monitor works when you
turn on the server, but the
screen goes blank when you
start some application
programs.
50
IBM System x3850 M2 and System x3950 M2 Type 7141: Installation Guide
Action
1. Make sure the monitor cables are firmly connected.
2. Try using a different monitor on the server, or try using the monitor that is being
tested on a different server.
3. Run the diagnostic programs. If the monitor passes the diagnostic programs,
the problem might be a video device driver.
4. Reseat the following components:
a. Remote Supervisor Adapter II
b. I/O board shuttle assembly
5. Replace the components listed in step 4 one at a time, in the order shown,
restarting the server each time.
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 keyboard cable directly to the
correct connector on the rear of the server.
2. Make sure that:
v The server is powered on.
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.
Important: In some memory configurations, the 3-3-3 beep code might sound
during POST, followed by a blank monitor screen. If this occurs, complete the
following steps:
a. Turn off the server.
b. Move the memory card to a different slot.
c. Turn on the server.
Note: BIOS detects a new configuration and automatically re-enables the
memory slots that were previously disabled.
d. Turn off the server.
e. Return the memory card to the slot that you removed it from in step 2b.
f. Turn on the server.
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.
5. Observe the checkpoint LEDs on the light path diagnostics panel.
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.
v If the server passes the video diagnostics, the video is good.
v If the server fails the video diagnostics, reseat the Remote Supervisor
Adapter II.
v Replace the Remote Supervisor Adapter II.
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