Apple Cinema Display, recognised but no output

[rogan]

Hi Guys looking for possible issues

I have a 24" cinema display that one day popped the screen went off work bought a new one and it'd been in a box for a year

I decided nows a good time to try and fix it,

I plug it in to my iMac and its recognsied as a cinema display, i can drag windows to the screen and i can use the iSight but theres no display on the screen, no blacklight no view nothing

Anyone know what might be wrong?

 

[MCAsan]

one possibility: backlight source (lamp or led) is gone

 

[CWallace]

If you move windows to the ACD and then shine a flashlight on it, do you see anything?

If you do, then as MCAsan suggests, the backlight might have failed. If you do not, then it could be a failure in the circuitry that drives the LCD.

 

[blueyesdevil]

Sorry for reviving an old thread but I'm having the same issue.

The display is a 24 inch cinema led display and everything works but the
backlight.

If I shine on the screen with a light I can see the display working.

What would fix this? Is a logic board replacement needed or a display replacement?

 

[AnonMac50]

Sorry for reviving an old thread but I'm having the same issue.

The display is a 24 inch cinema led display and everything works but the
backlight.

If I shine on the screen with a light I can see the display working.

What would fix this? Is a logic board replacement needed or a display replacement?

Your display will have to be repaired.

 

[blueyesdevil]

Your display will have to be repaired.

So the actual LCD needs a complete replacement? I was hoping it wasn't that
because those cost from 500 to 900 $.

I'm still going to open the display and do some voltage and connection tests.

 

[AnonMac50]

So the actual LCD needs a complete replacement? I was hoping it wasn't that
because those cost from 500 to 900 $.

I'm still going to open the display and do some voltage and connection tests.

Not the WHOLE thing. I'm not sure what boards there are inside the display but you may need a new logic board.

 

[ljonesj]

not nescaraliy my moms laptop lcd the inverter board went out in it for backlight so you could see if there is a small control board that connects the light to the rest of the monitor

 

[blueyesdevil]

not nescaraliy my moms laptop lcd the inverter board went out in it for backlight so you could see if there is a small control board that connects the light to the rest of the monitor

I will definitely open up the screen to see what is wrong and check out the
led driver connections/logic.