STM32H747_DISCO design display issue
Had to redesign my STM32F769 design take the STM32H747 (silicon supply issues). So I cloned the H747_DISCO pin for pin with the exception that I've no external Flash. I then built a TouchGFX test app based on the H747_DISCO, removed the QSPI need in the linker (pointed the QSPI to the internal Flash), burned it to a real _DISCO and all is good. Burnt it to my clone and I have video issues. Swap the displays and the error stays with the clone electronics. Both the _DISCO and the clone have the M4 cpu disabled. The M7 cores on both platforms run all day long, pass DDR memory tests happily. Have spent the past 3 days going over the schematics, the MX config etc, etc. but now at the point of asking for help. Can anyone point me in a direction as to what this could be? 
