I have just done exactly as you suggested Digi247- flashed box with TM's own version 1.27; restored to factory defaults then flashed with Phantompatch 1.18 ('cos I know that DID work for sure). Another factory reset, then scanned 11.495V. All channels picked up & saved OK, key entered via 8280 but still no a/v. Checked on 8280 and the key is not as I entered it- the second 'AA' has become '8F'. Very confused, as I didn't experience this problem before, what's changed?
just an idea have you tried flashing original firmware first then go to a patched one afterwards