Hello guys, im trying to fix my old benq desktop monitor
the screen started to go off after waking up the computer, if i turned it off and back on it would work for a couple of second and then go black. (later i realized just the backlight was off). all i had to do was to unplug it from the AC and plug it back again and it would work just fine. well this temporary fix stopped working and now it only works for a couple of seconds and the backlight goes off again.
first thing i thought it was the inverter circuit. i decided to go ahead and take it appart and inspect the circuit board looking for a bad capacitor. sadly every single part looks fine, i bench tested the inverter by just connecting the inverter wires to the lcd panel leaving the signal connector off. the backlight worked and stayed on with no problems, i connected the signal connector and then it stops working.
do you have any idea why this is happening? i thought it was just the inverter but since the light works i think that circuit is just fine and there is something else sending it the signal to go off.
the screen started to go off after waking up the computer, if i turned it off and back on it would work for a couple of second and then go black. (later i realized just the backlight was off). all i had to do was to unplug it from the AC and plug it back again and it would work just fine. well this temporary fix stopped working and now it only works for a couple of seconds and the backlight goes off again.
first thing i thought it was the inverter circuit. i decided to go ahead and take it appart and inspect the circuit board looking for a bad capacitor. sadly every single part looks fine, i bench tested the inverter by just connecting the inverter wires to the lcd panel leaving the signal connector off. the backlight worked and stayed on with no problems, i connected the signal connector and then it stops working.
do you have any idea why this is happening? i thought it was just the inverter but since the light works i think that circuit is just fine and there is something else sending it the signal to go off.