You can make it ignore that currently playing track but you said it did play okay before so *shrug*

The mic input chip looks okay as it does get detected as an a0 revision and I think those HD test messages are also normal. Mark should be able to tell you whether its okay or not.

The temp sensor shouldn't affect it to my knowledge. The DalSemi temp sensor chip used in the empeg has two operating modes and its possible to corrupt the configuration in it so it ends up in the wrong thermostat mode. You need to solder some wires to it to actually reset the configuration as it no longer responds to the serial bus.