hmm... I had a blocking Display at 7200 too when I change the bandend to 7200 because I have forgotten to change Line 1417. :-D
The default is 7030 if no?EEPROM recorded before.
You maybe check the librarys as described in the?TFTVFOManual.
For checking the display, you can compile and run "graphictest_kbv" in the MCUFRIEND_kbv Directory.
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Good luck and success! (and maybe a quick delivery of a new DDS...)
73 de Matt, DH2LAB
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DH2LAB