The initial issue was sudden but it's getting worse and
depends on the position of the screen, it flickers almost constantly now. But yes, over 4 years old and the wife is already budgeting for a new one for Father's Day so...
Not dropped that I recall but because it flickers
I'm thinking cable or connection type issue. I'm thinking that I'll either use it as a learning tool for the 10-year old to take apart and try to fix, with my help, or repurpose it as a HTPC and record OTA TV signals or hook it up to a monitor.
Then the question becomes what do I get to replace it.