Troubleshooting; No Operating At All - BenQ Q74A Service Manual

All manuals and user guides at all-guides.com

TROUBLESHOOTING

▶ No operating at all

What you see
Is the power inserted correctly?
Does the Power Adapter operate
correctly?
The Power Adapter operates correctly,
but the LCD Monitor does not operate
correctly.
Does The Power On/Off and the LED
Operate corretly?
The Power On/Off and the LED operate
correctly, but the OSD menu doesn't
display on screen.
The OSD menu operates correctly but
the image doesn't display on screen.
The Power On/Off operates correctly,
but the screen is 'ALL WHITE'.
The Power On/Off operates correctly,
but the screen is 'ALL BLACK'.
Q74A Service Manual
Suggested Actions
Insert the plug correctly referring to the User Manual.
Check the Power Adapter.
The green LED is OK.
Check the harness of the FUNC. B/D.
If the program of the MICOM is error, then exchange the
MICOM.
If the AD B/D is error, then exchange the AD B/D.
First, operate the FACTORY SET.
Second, check the Panel Harness that is connected to the AD
B/D.
Check the LAMP Harness of the Panel.
Lastly, exchange the LIPS.
Insert the SIGNAL Cable correctly referring to the User
Manual.
Check the LAMP Harness of Panel and Inverter.
Lastly, Check the LAMP of Panel.
The LAMP is OK.
Check the Panel Harness that is connected to the AD B/D.
Check the LAMP Cable.
Check or exchange the LIPS.
Check the Panel Cable.
-15-