Mine did the same thing, it started freezing after loading phantompatch 748 tried patching it back to741 and it froze mid load and then wouldn't start. Connected receiver via null modem cable and using TM-loader for TM-1000-5000-6000 Series installed patch 737. started loader, clicked connect and then turned on receiver. Patch applied and receiver now turning on but freezing every couple of minutes same as started after 748 patch. Going to try another factory reset and null modem patch again.