Service manual

6.4 Show “No signal” on screen.
Check that signal level of R612, R613, R614, R641, R642, R643, R644, R645, R646, R647, R648
Check the Hsync and Vsync
Failure point
1. IC401 failure.
2. Signal cable is disconnected.
Yes
No
No
6.5 Keypad cannot work.
Check the the cable is fully conneted between the interface
board and key board
1. D305, D306 ~ D311, D312 failure.
2. TACT switch failure.
Failure point
The cable is disconnected.
Yes
Failure point
No
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ViewSonic Corporation Confidential
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Do Not Copy VG910s/b