Our Ultra reboots around 10 pm every night, sometimes more than once an evening. The tv screen goes bright with multi colored pixels all over. When its done it comes back on ok. Checking system it shows that it either just updated or at least checked for an update. Can the time that it checks be changed to like 3am or set to manual?
Update.... Roku replaced the Ultra pretty fast. Now the replacement is suffering the same issue. The screen does this and then the ultra reboots. So far they have not offered a replacement again, they have been pretty quiet but things take time I guess.
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Since you are in recent contact with our Support team. We would recommend continuing to work with them to resolve the issue you are experiencing as they would best be able to assist you moving forward.