I have been working with a variety of TFTs as of late from different suppliers from 2.4" to 7". I have an issue with a current set up that just has me puzzled. Base info: Mega 2560 R3 IDE 1.0.1 Sainsmart TFT mega shield V1.0 (elecfreaks is the same board as far a pins and resistors, but better documents) http://www.elecfreaks.com/store/lcd-tft01-mega-shield-v10-p-214.html
and a 4.3 inch TFT http://www.elecfreaks.com/store/43-tft-lcd-screen-module-tft0143-p-419.html
I use a pot to reduce VCC to 3.3volts.
I generally begin with the UTFT library and for the SSD1963 use the Demo 480x272 UTFT myGLCD(ITDB43,38,39,40,41);. I understand this is not a named supported display but the SSD1963 is supported in the screen size. It is possible my initialization should be different?
The odd behavior: When powered via USB or wallwart the screen performs the clr.scrn command, visually wiping the screen left to right, occasionally it will show the sine wave of the demo, and then the screen develops white lines that run through the screen vertically then, slowly (4 seconds) fades to white. I have chased all connections down and appears everything should be ok. Hoping one of you TFT gurus have ran into something like this before.