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UML-202-90 TroubleShooting Guide | en 27

Bosch Security Systems, Inc. Instruction Manual F01U076723 | 1.0 | 2007.09

9 TroubleShooting Guide

Problem Solution

No image is displayed on

screen

1. Check that the power cord of the monitor is securely con-

nected into the wall outlet or grounded extension cable or

strip.

2. Power switch should be in the ON position and the LED lit.

3. Check that the Brightness and/or Contrast adjustments of the

display have not been turned down to minimum levels.

“Going to Sleep” mes-

sage is displayed

1. The signal cable should be completely connected to the video

card/computer.

2. The video card should be completely seated in its slot and the

computer switched ON.

Display image is not cen-

tered, is too small, or too

large in the PC mode

Push the down key to activate the Autoset function.

-or-

Adjust the Clock and Phase in the OSD submenu.

Vertical or horizontal

noise is present in the

picture

Push the down key to activate the Autoset function (for VGA inputs

only).

-or-

Adjust the Clock and Phase in the OSD submenu.

Incorrect colors 1. Press the Menu button on the front panel of the monitor, then

press the right arrow to select the Color menu. Press the

down arrow on the front panel and select Cool, Warm, or Nor-

mal.

- or -

2. Press the Menu button on the front panel of the monitor, then

press the right arrow to select the Utility menu. Press the

down arrow on the front panel and select Recall to reset to

the default settings.

The error message “Out

of Range” is displayed

PC is operating with either a resolution or timing mode that is not

supported by the UML-202-90. Change the PC timing mode to one

of the valid combinations below:

640 x 480; 60/72/75 Hz

800 x 600; 60/72/75 Hz

1024 x 768; 60/70/75 Hz

1280 x 1024; 60/75 Hz

1600 x 1200; 60 Hz

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