My HD500X keeps getting stuck on the loading screen while powering up. It's on a continuous loop of the 'Line 6' logo, and sometimes just comes up with a blank screen. I'm guessing there is no problem with the power cable as it is able to power up, just the logo is on repeat. I have tried holding the left button and plugg in in the unit, but no difference. I have also tried uninstalling/ installing ALL software and still no difference! I may be forced to send my unit back, but if somebody out there has a solution to this then I would greatly appreciate it.