Ibm T221 User Manual download pdf (Page 31)

Appendix B. Updating the settings for your monitor

Introduction

Modern monitors internally store data on their performance characteristics

and capabilities in an abbreviated format. The information is called the

monitor Extended Display Identification Data or EDID and is read by

operating systems and video graphics cards to determine the optimum

display properties for the system. The IBM T221 is a very advanced and

flexible monitor and it exceeds the capability of the EDID system to

describe it fully. A special OSD menu allows alternate EDIDs to be

selected which are more suitable for certain graphics cards. Unless you

change the video graphics card that drives your monitor, there is usually

no need to change the EDID settings. The EDID update procedure must

be done carefully. If an incorrect EDID is selected, it is possible that the

monitor may not display any images afterwards.

Applicable model: All models with the following firmware level

The procedure given in this document applies to monitors with firmware at the

following levels:

DDC CPU Version 3.2 or higher

OSD CPU Version 5.0 or higher

USB CPU Version 4.0 or higher

FPGA LOGIC Version 34 or higher

To check each version, see the next page. If you need to change the

settings on a monitor that has firmware at a lower level, refer to the IBM

technical website for T221 monitor.

1. Setting

a. Connect the monitor to the desired graphics card and / or computer

system

b. Turn on the monitor and the computer. PC. Wait until the system has

completed loading and a stable screen image is displayed. Confirm

that the power indicator on the monitor shows green. If there is no

image is displayed and the power indicator shows steady amber,

press the Debug switch to turn on the monitor (see the following

figure), the power indicator will show blinking amber. The video image

from the computer will not appear but the screen will display a

sequence of test patterns.

CAUTION:

Do not use conductive material to

press this switch. It may damage the

electric circuit inside of the monitor.

Debug switch

(inside of the

bottom cover)

Bottom view

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Ibm T221 User Manual Page 31

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