BenQ 9H.LDMLA.TB Series, Service Manual

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5.2. Do Reset All in user menu.
5.3 The way to open BenQ factory menu
(1)Connect signal source and power cable to monitor and DC off it.
(2) Press “Enter” key and “Exit” key as below figure at the same time and then Press “Power “ Key to turn
on the monitor
. When the screen lights, release the buttons and then press “Exit” key to open below factory
menu.
Factory mode