23” Cinema Display - no video

[mikiotty]

Hi everyone!
I have a 2005 23” Aluminium Cinema Display that doesn’t display any video.
The display turns on, and the backlight comes on (and I can even adjust the brightness with the side buttons) but the screen stays black. The display is perfectly recognised by the computer, but it doesn’t show anything on the screen.
Do you know if it’s a common issue and if it’s fixable without replacing the entire logic board?
Thanks!

 

[eyoungren]

How is it connected, and to what type of computer?

 

[mikiotty]

How is it connected, and to what type of computer?

DVI, USB and power.
Tried with an original 90W, 65W and aftermarket 90W PSU.
I tried with every computer in the house, including various PowerMacs. They all work with the other 20” Aluminium Display I have.

 

[eyoungren]

DVI, USB and power.
Tried with an original 90W, 65W and aftermarket 90W PSU.
I tried with every computer in the house, including various PowerMacs. They all work with the other 20” Aluminium Display I have.

Something to try…maybe a Hail Mary.

Connect it to one of your PMs, via direct DVI and with the Mac off, turn it on and do a PRAM reset. My thinking here, is that maybe it's 'stuck' on a specific resolution that none of your computers are picking up. Maybe a PRAM reset will 'force' it.

As I said, a Hail Mary - but something to try anyway.

 

[mikiotty]

Something to try…maybe a Hail Mary.

Connect it to one of your PMs, via direct DVI and with the Mac off, turn it on and do a PRAM reset. My thinking here, is that maybe it's 'stuck' on a specific resolution that none of your computers are picking up. Maybe a PRAM reset will 'force' it.

As I said, a Hail Mary - but something to try anyway.

I’ll try it tonight. Thank you!

 

[Amethyst1]

My thinking here, is that maybe it's 'stuck' on a specific resolution […]

If the aluminium ACDs are like the acrylics, they don’t have a built-in scaler. So if you don’t feed them their native resolution they remain as black as a moonless night.

 

[Wild Hare]

A “Hail Mary”… v.2?

Here’s something else you might also try.

Some of these monitors had/have an internal “grounding problem”(?). At any rate, had one here that exhibited similar symptoms as yours - and “found” somewhere that if you cover the two center connection pins inside the power plug with cellophane tape, the display then works fine.

That’s 10 pins total (5 per side / green arrows) but only the two middle pins (both sides) need be covered in this manner. Hopefully you can see in the attached pic where both have been covered with tape strips. AND that slim tape strip needs to cover ONLY those two pins all the way down into the plug.

Apologies for the dirty looking plug (this one was out in the garage).
But this approach did/does work on this particular monitor… here.