Erratic LCD behavior

[Travin77]

I am using a radio shack 4.5v 1600ma power supply. The pic is a 16F876a. I am not using the backlight on the lcd, but it does have one. My pic is reading two serial sensors, a rtc, a 18s20 ow temp sensor, 3 leds, a radon sensor (serial). It performs xout commands based on the parameters of all of this. It works fine until it gets to the xout command. Thats when the LCD starts going black, and then the program goes back to start and starts over. The pic is pretty heavily loaded and every pin is used. The code also crosses the 800h boundary but it still works. I am using PBP and the pic is running at 20 mhz. Thanks for the help. I am going to try the capacitor idea. Thanks again.

[DynamoBen]

Sounds like a short on DQ between either Vdd or Vss. The other possibility is a damaged one-wire device. If you remove the one-wire devices do you still have a problem?

[Travin77]

The caps between vss vdd worked like a champ! I guess the xout was pulling too much juice and the regulator couldn't keep up. Thanks a lot.