I tested it... With the jumper, it's better... But sometimes, instead of having a "a" for example, a "

Hi !

Here have I tested my LK202-25 with the software "LCD Tester"... No problem during a moment: I was able to display bar graph, clear screen, set start text...
But now, it doesn't work... Only the start text is OK. Then when I want to clear screen, a black case appears on the character. Other ...