I purchased a Tontec 2.4 TFT on dealextreme, with the adapter. I connected it to the raspberry like this:

After following step by step the instructions (from here: Instructions)

My screen is always blank, either I run the program that is supposed to get the screen working or not, and when it's supposed to work it doesn't it just stays blank.

Any suggestion?

  • I don't see connection instruction in the link you provided but the red stripe on the cable usually denotes pin one, but it doesn't look like the red stripe is aligned to pin one on the Pi. Are you sure you have the connection right? – Steve Robillard Oct 20 '14 at 2:06
  • i tested it on the other way and i get the same result :( – manutheking Oct 20 '14 at 10:13
  • you may have killed it if you connected it backward. Which way is supposed to be connected? – Steve Robillard Oct 20 '14 at 18:07
  • after searching I found an user guide, which had this image: <a href="imgur.com/K5zUke9"><img src="i.imgur.com/K5zUke9.png" title="source: imgur.com" /></a> The fist time I plugged in the cable was in the correct form and it didn't work either – manutheking Oct 21 '14 at 7:31
  • The image above and the one on imgur don't match. The red strip above is on the ethernet side of the board and the one you linked to on imgur has it toward the sd card end. – Steve Robillard Oct 21 '14 at 7:45

I broke the screen by connecting it the wrong way, to fix the lcddemo issue that comes with the manual follow these instructions provided by Steve:


(if you cant compile lcddemo giving you error "setPrecision" on lcd.c, you will have to edit the .c file by commenting the switch (precision) method)

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