Hi,
I thought it might be helpful for others if I described how to change the backlight of an older LCD display, in this case of an audio analyzer system, Neutrik A1.
At first I didn't know that its display is illuminated...
![Lips Sealed :-X](https://www.eevblog.com/forum/Smileys/default/xlipsrsealed.gif.pagespeed.ic.8oTr2_WWv_.png)
I came across it by chance in the manual, because the switch-off after a few minutes was described there - with my A1 I had never seen anything light up...
![Huh? ???](https://www.eevblog.com/forum/Smileys/default/xhuh.gif.pagespeed.ic.6Nvt7O8a11.png)
But in fact, when it is completely dark in the room, you can see a very faint glow...
![Wink ;)](https://www.eevblog.com/forum/Smileys/default/xwink.gif.pagespeed.ic.cldandycH0.png)
LCD-Display is a 5.3" one from
Optrex and the backlight is realized with a EL-foil...
Afaik EL-foil get several advantages, e.g. ultra-thin, but at least two disadvantages:
-Must be driven with "high voltage" (appx 100V/400hz)
-Lifetime....1000...2000hrs
It gets darker and darker until at the end only a barely perceptible glow remains...Aha.
![Wink ;)](https://www.eevblog.com/forum/Smileys/default/xwink.gif.pagespeed.ic.cldandycH0.png)
The display-module is obsolete and EL-foils are rare but I had luck and find one very similar here:
https://www.backlight4you.com/EL-Panels/EL-Replacements/EL-Panel-pink-white-77mm-x-140mm-laminated::839.htmlThis store specializes in backlighting, including hard to get ones, very nice.
Yesterday the foil arrived and I´ve started to disassemble the frontpanel of the analyzer.
Tomorrow it should be finished..
edit: link to shop fixed.