Brand new EX5100 problem

[beamerno1]

Hi all,
I have just bought an EX5100 which was preloaded with FTA software. I tried a scan anyway and found it only showed free to air channels. I downloaded the UFL from here and tried to flash it but it just said download fails. Anyway, i tried it on tv again just in case it worked and box wouldn't come out of stand by mode. I switched it off with power button on back and now the switch seems to be locked in the off position. It will not switch on.
Anyone any ideas? Are they now being sold with some kind of protection or has my box gone faulty just by coincidence?

[hill8764]

wot sort of cable are you using it shold be a null modem cable

[beamerno1]

RS232 cable that came with the box. The UFL recognised it and went through the load process but said it failed at the end. My problem now is that it wont switch on to try the loader again.
If i tried to send it back faulty would i have a warranty problem coz i tried to change the firmware?