Other than that it seems to work, is there any scenario under which my tv’s are not supported?
Even though those TVs may not support every exotic resolution/refresh rate combination, they should (at least) support the grey test pattern the OSSC should(!) output without any source connected (since it’s outputted in standard 480p/60Hz).
Also quick q on the tvs diodes – how essential are they and could bad connections there be the problem? In reading up the diodes are for esd protection of the chip only.
Afaik D6 & D7 are not essential for functionality (since the traces are connected even without the diodes in place). They are a pain in the ass to solder manually… so you may want to leave them out…