Benq RL2240H LED Blink and shut down after 1 sek

[chrle]

hello

I have Benq Led monitor,and problem is : when I turn on monitor shows logo and after 1 sek shut down.

I changed all caps on power supply.

when I unplug monitor for a day ,he turn on normally,and after 10 minuter shut down again.

[chrle]

Re: Benq RL2240H LED Blink and shut down after 1 sek

today started normally,but when I plug vga cable to monitor shut down to stanby mode,orange led...

[chrle]

Re: Benq RL2240H LED Blink and shut down after 1 sek

when I leave monitor for few hours , backlight turn on normally. for few seconds. after that only flashing when power on.

[chrle]

Re: Benq RL2240H LED Blink and shut down after 1 sek

uploading pictures

[chrle]

Re: Benq RL2240H LED Blink and shut down after 1 sek

I see picture on display when I take flashlight near display,so backlight is refusing to start.

any suggestions?

[djordje]

Re: Benq RL2240H LED Blink and shut down after 1 sek

Hello,
I have similar power board that is broken and i cant find schematic, so my question is can you tell me what voltages are you getting on that connector CN701(with 9 wires)?

And about your problem it looks like your backlight is not working because of 2 possible problems:

1)Maybe power board isnt giving power to backlight
or
2)Your backlight is broken and you need to check it

Easiest is that you first check voltages on that small connector that is going from power board to lcd.

[chrle]

Re: Benq RL2240H LED Blink and shut down after 1 sek

Hello,
I have similar power board that is broken and i cant find schematic, so my question is can you tell me what voltages are you getting on that connector CN701(with 9 wires)?

And about your problem it looks like your backlight is not working because of 2 possible problems:

1)Maybe power board isnt giving power to backlight
or
2)Your backlight is broken and you need to check it

Easiest is that you first check voltages on that small connector that is going from power board to lcd.

voltage on CN701 connectors are 0.09V(first PIN and others)

voltage on small connector that is going from power board to lcd is olso 0.09V and droping- rising

[chrle]

Re: Benq RL2240H LED Blink and shut down after 1 sek

I changed this caps on board..

[Ogisaga]

Re: Benq RL2240H LED Blink and shut down after 1 sek

Hello there,
Did you solved the issues by changing the caps?