SOUND makes LCD quit working

[mister_e]

at the end of your program, you should or finish by a STOP command or with an endless loop, unless your PIC may behave in a weird way.

Here:   GOTO Here

You may also need to check if ALL ADCs and comparators are disabled. Here i see 2 missing lines

ANSELH = 0
CM2CON0 = 0

And then what you drive and how, may help us to go deeper in our understanding.

HTH

[jderson]

Thanks for the help! The ANSELH = 0 line fixed the problem! This is a small part of my program. As I use PORTC to control the LCD, it's a wonder this hasn't caused more problems before now. I thought I RTFDS enough, but apparently not! Thanks again.