91369 Service Manual 5-3
Troubleshooting
When this screen is displayed, the monitor automatically begins power-ON diagnostics. Any diagnostics
failures are reported in the upper window. If no serious diagnostics failures are encountered, the monitor
continues past this screen and starts normal monitor operation.
During the countdown, the booting operation can be halted and a Boot menu of boot options can be displayed.
The Boot menu and the power-ON diagnostics are described in the sections that follow.
Boot Menu
The Boot menu (Figure 5-3 on page 5-4) is activated during system startup. It allows access to several basic
configuration menus and functions of the monitor, including extended diagnostics. All text displayed on the
screen is also output to the serial port.
To activate the Boot menu:
1 Power ON the monitor and wait until it displays the countdown.
2 Before the countdown expires, perform the following step using either the touchscreen, mouse, keyboard,
or terminal (or a computer with terminal emulation software) connected to the serial port:
• Touchscreen — Touch the bottom left and then the bottom right corner (not simultaneously) of the
screen (
Figure 5-2).
• Mouse — Click the left and right mouse buttons simultaneously.
• Keyboard or terminal — Press CNTL+D (the terminal’s serial port should be set to 9600 baud, no
parity, 8 data bits, and one stop bit).
Figure 5-2: Finger placement to initiate Boot menu using the
touchscreen during the countdown
3The Boot menu appears as shown in Figure 5-3.
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