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 on the IBM System x Documentation
CD 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 Action
The screen is blank.
1. If an external USB hub is in use, disconnect the monitor from the hub and
connect it directly to 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 65.
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 and the Boot
Fail Count option in the Start Options of the Configuration/Setup Utility
program is enabled, you must restart the server three times to reset the
configuration settings to the default configuration (the memory connector or
bank of connectors enabled).
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 the Problem
Determination and Service Guide for information about recovering from a BIOS
failure.
5. See the Problem Determination and Service Guide for information about solving
undetermined problems.
The monitor works when you
turn on the server, but the
screen goes blank when you
start some application
programs.
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 the Problem Determination and Service Guide for
information about running the diagnostic programs). If the server passes the
video diagnostics, the video is good; see the Problem Determination and
Service Guide for information about solving undetermined problems.
62 IBM System x3550 Type 7978: Installation Guide
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