Hi.. and please help! I will only be here for a few days as this was a gift to my dad! So everything worked fine (roku se to Sanyo tv) picture and sound were a ok! I left (they were taking my child for 2 weeks) & during that they called and said they had sound, but no picture. I have tried everything! And again.. everything was fine and worked so I'm pretty sure it's not the TV.. PLEASE HELP!!!!!
Again, its most likely the "new" Roku SE - the 3930SE/3930S2 (3930).
Try having them connect it another TV then manually configuring the display: Settings/Display/720p TV
Then reconnect it to the first TV.
Otherwise, they can try "blindly" setting it to 720p: hit the Home key a few times then: Up, Right, Down 3x, Right, Down, Select, Select, and assuming they see something at this point, select to confirm.