Also, If you unplug the connector from the LCD Display when it is not displaying properly and connect it to a Laptop running HyperTerminal the correct info comes through.
(the control characters look like garbage though)

For a little background on this issue I have had similar issues Likely related, check this thread:
http://www.lcdforums.com/forums/viewtopic.php?p=21185#21185

The power supply is a very stable (confirmed) Switching DC supply.

As for the symptoms: Prior to locking down the baud rate (data lock ...

I have an LK202-25-WB running off of a PIC 16F877A through a MAX232. This display is only for display, There is no Keypad attached to this.
I am having a problem with line noise being picked up and "reprogramming" this display.

I have already tested locking down this display using the value of 128 ...

Thanks for the assistance in this matter it was a great help along with the documentation. Using the menu features and remember wouldn't save the settings. However http://www.lcdforums.com/forums/viewtopic.php?t=3371 along with the previous tips actually set and retained the Baud rate. It appears as ...

Thanks for the quick response.

As for the first approach I've tried this and several approaches to this method and it can accept these settings and communicates very well through a PC. The problem is when you cycle the power ALL settings that were modified disappear and operation reverts back to ...

I have an LK202-25-WB as a display only driven by a 16F877A through a Max232 for the RS232 connection running at 9600-n-8-1. The 5VDC power is supplied through the DB9 connector And has worked predictably for about 2 years now. This display is usually just left on 24/7 but has been encountering a ...