And nothing is found on the web from my searches that the firmware was ever updated. If this fails my bet is you replace the board with that firmware. You are past the usual 5 years where makers close the books and stop repairing which irks folk but if you like the model, I'd look to Ebay for a working replacement.
I have a TS913ES 5.1ch Surrond Compact Receiver System that dosent have any audio ouput.
By looking around I was able to find that my DPS version and it looks corrupted, when I read the version i have: D 05 F
It looks like the is a software version named: DSP_SR906_1XXXXXX.hex that could fix my problem. Is there anyway to find this software?