Hey Tony,

Message received. The web form was removed to correct a spamming issue and reinstalled but haven't had the chance to fix it.

I sent you an e-mail with the following:

The line driver ICs are known to give out sometimes from static discharge. There isn't much in between transmitter board and receiver boards for the buttons so if these connections all have continuity I would guess a bad IC (MAX3237EAI+). The control line of the display which controls the buttons and remote run through pin 6 of the display connectors. On the transmitter board, the control signal goes through pin 17 and 12 of IC34, through filter C107 pins 6 and 15 to DB-25 pin 13. On the receiver it goes through DB-25 pin 13 to filter C116 pins 15 and 6 to IC35 pins 8 and 15 and back to display connector 6. Also make sure R51 on the TX board is populated and not R52. Should be since these were all tested before shipping.

Let us know what you find.
Stu