In another discussion, in this forum
Originally Posted by tbucht
It seems that many of us have attempted a firmware upgrade which resulted in non-functioning video and no OSD. I have found a solution if you have these symptoms:
Second line of receiver display is blank when showing firmware revision (use Remote '1 2 3 4 Set' to see). The blank line seems be an indicator of corrupt video firmware.
Cause of the problem:
HK_Upgrader.exe sometimes chooses the WRONG .hex file for the video upgrade (second part of the update). HK_Upgrader.exe (10-23-2007 version) is included with the firmware...
To confirm your updater has the problem (you don't need a serial cable to do the check):
Get to the step where you 'select the directory with with the upgrade files', browse and open the AVRx47 folder. Now look at the name of the .hex file - is it sst25vf080b_isptemp_spi.hex ? This is WRONG, it should be cust_1000_ntsc.hex.
Exit the upgrader.
Before starting HK_Upgrader.exe, move (not copy) sst25vf080b_isptemp_spi.hex to another folder.
This time the hex file should be cust_1000_ntsc.hex.
Do the first (DSP) part of the updgrade. When it completes, move sst25vf080b_isptemp_spi.hex back to the folder containing HK_Upgrader.exe.
Now, continue the rest of the upgrade.
I don't know how HK_Upgrader.exe chooses which .hex file to use, but it clearly has a bug if it chooses sst25vf080b_isptemp_spi.hex as the upgrade file. Once HK_Upgrader.exe has been forced to choose cust_1000_ntsc.hex, it seems to keep choosing that file if you re-run the upgrader