We purchased a 55" Class Q6D QLED Smart 4K UHD TV two years ago. Two days ago it started rebooting, going black, and looping the logo. We tried everything from removing all gadgets attached to it, unplugging, etc. We can't even get to the settings to see if it will update. From reading other posts, it could be a hardware / design flaw, and could cost up to $1000 to fix it. Help, please.