In SX Microcontrollers, SX/B Compiler and SX-Key Tool, PJ Allen wrote:

I believe that I do [i]get it:[/i] you're saying that you must (however inexplicably)have your serial-LCD, which is [u]not[/u] being used by this project (anymore), with its +V [u]and/or[/u] GND [u]and[/u], additionally, its RX line connected to your SX-board for operation.
   +V & RX       = OK

  GND & RX       = OK

 (+V & GND) & RX = OK

  

  I may be [i]totally[/i] [i]out of it,[/i] but this just leads me to figure that you're getting, at least, a Ground from the LCD.  If nothing is using the LCD and especially since it provides no feedback (as it never TX's back to the SX or anything else) -- what else could it be?

  Is there a complete schematic (is it in one of the other Subjects that you've originated)?

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