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Acer X193 X183H / X193HQ Service Guide - Page 20

Troubleshooting, 1 No display on the screen Screen is black and colour of LED is amber.

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5. Troubleshooting 5.1 No display on the screen (Screen is black and colour of LED is amber.) ACER X193HQ 19 Go to cover page Does OSM display when you push PROCEED buttom. No When a signal isn't being inputted, it is indicated with "No Signal Input". it is indicated with "Out Of Range" at the time Yes of the frequency that it can't be distinguished. Check if the sync signal from computer is output and if the video cable is connected normally. NG OK Proceed "No OSM display" section. Input the sync signal of computer, or change the cable. Proceed "checking the resolution change IC movement" section.

Section	Page
Cover	1
Important Safety Notice	2
1. Product Specification	2
1.1 SCOPE	2
1.2 GENERAL REQUIREMENTS	3
1.3 ELECTRICAL	3
1.4 PANEL ELECTRICAL	7
1.5 Optical Characteristics	8
2 OSD Menu	9
2.1 MAIN OSD MENU	9
3. Exploded Diagram	11
3.1 Packing Exploded Diagram	11
3.2 Product Exploded Diagram	11
4. Assembly and Disassembly Procedures	12
4.1 Assembly procedures:	12
4.2 Disassembly procedures	16
5. Troubleshooting	20
5.1 No display on the screen (Screen is black and colour of LED is amber.)	20
5.2 Nothing displays on the screen (Screen is black and colour of LED is blue.)	21
5.3 Checking the back light unit	22
5.4 Abnormal screen for VGA	23
5.5 Abnormal screen (For the DVI)	25
5.6 Abnormal OSM display adjust problem	25
5.7 Abnormal plug and play operation for VGA	27
5.8 Abnormal plug and play operation (For the DVI)	28
5.9 Checking the interface circuit of sync signal	29
5.10 Checking the resolution change IC movement	30
5.11 Checking the DC/DC converter circuit	31
6. Firmware Upgrade Process	32
6.1 Hardware Configuration	32
6.2 Realtek F/W Configuration:	32
7. Writing EDID Process	34

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