I have an acer G236HL monitor. I would like to reuse as many parts as possible. When I disconnect everything except the mainboard, thats connected to the backlight and plug in the power supply, the light turns on. But only for a few seconds.

How can I revire my mainboard so that it stay turned on? Unfortunately I could not find any circuit information online. Thanks a lot. (Picture of my curcuit board: htt ps:// ibb.co /6JqpZ5Y )