Sides of TV screen are dark

[DronePro]

I purchased a QN90D 75inch TV this weekend. I used it Saturday, Sunday, Monday with no issue. Today (Wednesday )I turned it on and only the middle of the TV was bright. No settings brought it back to normal but I did cut power to it and after turning it back on, it's working fine. Should I be worried, is this a fluke? I have 2 year warranty on it. I came from a Q70R that has never had any issues at all. 

[Samsung_Moderator · Accepted solution]

Hello and thank you for reaching out to the Samsung Community. We recommend having a technician look at the television for a diagnosis if the display concern is present during a screen (picture) test. You can contact a service technician using this link- https://www.samsung.com/us/support/service/ or send a Private Message by selecting any moderator and clicking on the chat option with your full model and serial number.

[useryCA5A0jZKp]

No need to worry, your TV probably received updates that were incompatible with the information stored in the TV's cache memory. By unplugging it, you have cleared the cache.