[sdiy] LEDs dying in LCD alphanumeric display

[Giles Ward]

> Why would the LEDs that backlight my Proteus' 2x16 LCD display slowly 
> die from left to right over the course of a couple of weeks? Seems like 
> an odd failure mode. The LCD works and responds to contrast control. The 
> 5 volt supply for the LED circuit is separate from the LCD supply, but 
> they both measure up fine.
> 
> It's one of these...
> http://www.densitron.com/displays/Alphanumeric_LCD.aspx
> 
> Can you crack these open and replace the LEDs or do you replace the 
> whole unit?

I've just switched on my Proteus 1, it looks like it's side lit from 
each end of the screen rather than behind it so maybe just one end has 
gone from yours.  New 2x16 LED backlit displays are very cheap on Ebay 
but usually they're a bit thicker - that Densitron page does say 'low 
profile edge light options for thinner displays'.

Giles