Hi Matt,
we are having the same problem at several setups for a film festival here. Almost all out of 30 HDLink devices failed after some hours switching playback from several film formats, 23.98, 25, 30, back and forth. It seems to be a heat problem plus format switch bug.
After a while (hours) they seem to be usable again.
Regards, Oliver
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nanocosmos broadcast and streaming software
https://www.nanocosmos.de