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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 Action
The screen is blank.
1. Make sure that:
v The server is turned on. If there is no power to the server, see “Power
problems” on page 73.
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).
2. Make sure that the correct server is controlling the monitor, if applicable.
3. Make sure that damaged BIOS code is not affecting the video; see “Recovering
from a BIOS update failure” in the Problem Determination and Service Guide
on the IBM xSeries Documentation CD.
4. See “Solving undetermined problems” in the Problem Determination and
Service Guide.
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 “Running the diagnostic programs” in the Problem
Determination and Service Guide on the IBM xSeries Documentation CD).
v If the server passes the video diagnostics, the video is good; see “Solving
undetermined problems” in the Problem Determination and Service Guide.
v (Trained service technician only) If the server fails the video diagnostics,
replace the system board.
70 xSeries 206m Types 8485 and 8490: Installation Guide