It MU isn't accepting it and GE won't let you download your oem maps then you need to contact Garmin support. I see you're in UK so don't bother emailing them, they don't answer by all reports. Jump on the blower, coz i've heard their phone support is really good. They'll be able to enable your maps, but i dunno if you should let them know that it's been bricked and cured as i'm not sure on what their attitude is to 'outside repairs'. The would have told you to send it in with a big cheque for an exchange unit when it's outside of warranty.