Receiver Info: Onkyo TX-NR809
Firmware Version: 1091-0977-??10-9105
Main Firmware: 1.09 11x18AM
Yes, the firmware showed two "??" in the version number. I have to assume that this is probably the issue. I have tried hard-resetting the box and try to do a firmware update over the network, and via USB and the same problem occurs. When the receiver starts to write the firmware, it stalls at 98% (Writing, not downloading) the screen shows "DSP2 Writing 98%". I have let it sit in that state for over 12 hours, to make sure it didn't just take a while.
Does anyone have any ideas how to fix this issue? Is there any serial, JTAG or otherwise force the firmware update onto the eeprom? Thanks for any help provided.