Problem in LCD of LP-PIC DEM 2 PLUS Demo Kit

Thread Starter

ecaits

Joined Jan 6, 2014
56
Dear Friends,

In my LP-PIC DEM 2 PLUS Demo Kit, LCD is becoming too dull and not working at all. Before one day, it was flickering but today it was gone totally. I am using 40 pin PIC16F877.

I have checked for any short wire but not found any.

Can anybody know why this problem happen??? What may be the cause for that???
 

Attachments

MaxHeadRoom

Joined Jul 18, 2013
28,617
If you used a previously proven program and it worked, then the display itself could be the culprit.
The ones on both versions of Pidem-2 that I have are odd ball type interface, so I have changed mine out for a HD44780 types.
Max.
 

ErnieM

Joined Apr 24, 2011
8,377
Did you try turning the CONTRAST knob?

Sometimes the housing comes apart and the "zebra" strip does not bress the glass hard enough to make good contact.
 

MaxHeadRoom

Joined Jul 18, 2013
28,617
I guess the reason I did not recognize it as a authentic Picdem is that it appears it is a knock off, so most likely can use a standard Hitachi version and will not need to change the program as would be the case in the standard Picdem 2 versions
Max.
 
Top