BenQ Q7T4-FP71G, Service Manual

Page: 36 / 66

Q7T4-FP71G LCD Monitor Service Guide
Circuit Operation Theory
7
Confidential
Fig. 7
A-3.) Control board introduction:
The main parts of the control board are a push button, and a LED.
(a) Push button: It’s a simple switch function, pressing it for “ON” to do the auto
adjustment function, releasing it for “OFF” to do nothing.
(c) LED: It indicates the DPMS status of this LCD monitor; green light means DPMS on
(Normal operating condition). Amber light means DPMS off (Power off condition).