HP L1940 Service Manual page 21

8. Click Next , bring up Fig. 39.
- Click Finish to exit the Step window.
- Serial number can be filled up at this moment (for example,
TWP318Q001).
NOTE: You must modify the Serial NO. In step 9, otherwise the Serial
NO. In OSD Couldn't be modified correctly.
Fig. 39
Step 5: Write DDC data
1. Configuration should be as Fig. 40. And press OK.
2. Access Factory Mode
1). Turn off monitor.
2). [Push "Auto Adjust " and "+(plus) and hold them at the same
time ] + [Press power "Power " button untill comes out "Windows
screen"] => then release all button, then press "Menu" button, wait
until the OSD menu with Character "F" (below OSD menu) come
on the Screen of the monitor (see Fig. 41).
3) Push Menu to exit OSD menu. " "
3. Click (Write EDID) icon from the tool bar to write DDC data.
Then the screen will be black for 5-10 seconds, when the screen
recovers ,DDC data will be finished Writing.
DDC Instructions
4. Confirm Serial Number in User Mode
1) Press the "Power " button to turn off the monitor. Press the button
2) Press the" Menu " button to bring up the OSD main menu.
3) Press the " Minus "button to " INFORMATION", press the" Menu "
4) Confirm the Serial Number "TWP318Q001" is updated as shown in
Fig. 40
Step 6: Save DDC data
1. Click
Fig. 41
2.
Factory Mode
Step 7: Exit DDC program
Indicator
Pull down the File menu and select Exit as shown in Fig. 44.
again to turn on the monitor.
button to confirm your selection.
Fig. 42.
Sometimes, you may need to save DDC data as a text file for using
in other IC chip. To save DDC data, follow the steps below:
(Save) icon (or click "file"-> "save as") from the tool bar and
give a file name as shown in Fig. 46.
The file type is EDID46 file (*.ddc) which can be open in WordPad. By
using WordPad, the texts of DDC data & table (128 bytes, hex
code) can be modified. If DDC TEXTS & HEX Table ar completely
correct, it can be saved as *.ddc flie to re-load it into DDC IC for DDC
Data application.
Click Save.
Step 8: Turn off the monitor, exit the factory mode.
21
HP L1940
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Fig.42
Fig. 43
Fig. 44