Hi There It is been a wile, but I encountered the following problem:
My Lcd (2x20) suddenly got only A black bar on the top row.
I have made one change: I made a proper pcb for the power supply instead of a breadboard. Everything works fine, but fine I only got 4.95 V. and 13.91V for 2 SID.s Could this small difference be the problem?
Kind Regards,
Youri
Highly unlikely, the 4.95V volts are well within the tolerance of any given LCD (how precise is your meter anyways 
).
Is the black bar just one pixel or is the entire first row filled with black blocks?
nIls, Thanks for the reply.
It Is the complete top row. It is A Oriental Display DM2002B. And I had some problems with the CAN bus interface -it could not detect my second sid- although I followed every step for the upgrade. But every else worked fine and it did not bothered me that much at that point.
I tested the lcd back in 8-bit mode on an older Pic-core and that worked fine, so it is not fried.
Then I looked up the specs for the screen and thought I found that the problem in wrong wiring (I wired it according to the 2002C instead to the 2002B type).
But now Backlight and brightness are not working and I still have the blackrow, so the previous should have been the right one.
thanks in advance, Youri
[edit]
I also did a complete reprogram of Mios 1.9 and then the Sid 2 Application with the only thing that uploading with LCD gives the error #11 midi-in Overun. And without not.
[edit2]
How should I read the numbers on the LCD when the are not on a straight line? so I have 2 lines of 8 next to each other where, looking from above, the left bottom has 1 and the top right has a 16. I soldered from left(1)-right(2), left(3)-right(4), etc. again it did work, but just to be shure.
How should I read the numbers on the LCD when the are not on a straight line? so I have 2 lines of 8 next to each other where, looking from above, the left bottom has 1 and the top right has a 16. I soldered from left(1)-right(2), left(3)-right(4), etc. again it did work, but just to be shure.
with the other way around you would have already fried your LCD
Best Regards, Thorsten.
Aha, so I still have some luck over:)