I was getting the same error about stb ram, but i tried the EromUpgrade file in the erom_upgrade_8Mflash folder and it worked.
If your using a USB to serial adaptor try these drivers here: USB-RS232 Serial Converter Driver Download
Worked for me.
If your using a USB to serial adaptor try these drivers here: USB-RS232 Serial Converter Driver Download
Worked for me.
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