Analogue-sequencer

> Hello list..  my pled display has gone blank recently.  All 
> connections 
> internally look/feel solid.  Where can I probe to check for 
> voltages to 
> see if the display is truly dead?

If your P3 is booting up, then the PLED module itself is communicating as
expected with the CPU, so it could be the display element or the drive
circuit for it that has failed.
First thing to check is that the voltage from the brightness trimmer is
reaching pin 3 on the module.
If that connection is broken, it will be blank. Doesn't seem too likely
though.

Although they look great, the reliability of the PLED modules hasn't been
anywhere near as good as it should have been.
Premature dimming of pixels has been more of a problem than outright
failure, but I think 2 or 3 modules have died now, out of around 200.

For modules that fail under warranty, I'm offering white on blue LCD modules
as a replacement.
It may be that the PLED modules that have had problems wre from a bad batch,
but I'm not taking a chance on them again.

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com