Lenovo x3300 M4 7382 Installation And Service Manual page 154

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See Chapter 5 "Parts listing, Lenovo System x3300 M4 Type 7382" on page 159 to check if a component is a
structural, or FRU part.
• If an action step is preceded by "(Trained technician only)," that step must be performed only by a trained
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.
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System x3300 M4 Installation and Service Guide
Action
1. Make sure that 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. (Trained technician only) Replace the system board.
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:
• The server is turned on. If there is no power to the server, see "Power
problems" on page 145.
• The monitor cables are connected correctly.
• The monitor is turned on and the brightness and contrast controls are
adjusted correctly.
3. Make sure that the correct server is controlling the monitor, if applicable.
4. Make sure that damaged server firmware is not affecting the video; see
"Updating the firmware " on page 91.
5. Observe the checkpoint LEDs on the system board; if the codes are changing,
go to step 6.
6. 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 technician only) System board.
7. See "Solving undetermined problems" on page 154.
1. Make sure that:
• The application program is not setting a display mode that is higher than the
capability of the monitor.
• You installed the necessary device drivers for the application.
2. Run video diagnostics (see "Running the DSA Preboot diagnostic programs" on
page 130).
• If the server passes the video diagnostics, the video is good; see "Solving
undetermined problems" on page 154.
• (Trained technician only) If the server fails the video diagnostics, replace the
system board.