Samsung SMART TV (Feltham TW14)

I can't remember how long we've had it but we've only just replaced it (today!) with a new one. It has the usual connection options with Wifi, RGB, HDMI, but not SCART (it's not that old!). It has a 55" Screen, although there are four bright 'dots' on the screen (see pictures). According to Google it's a relatively easy 'fix' although I'm not brave enough to attempt it. It's been hanging in our bedroom so hasn't had the usual amount of use that a living room TV would get. No stand, but I'm including the wall bracket which was originally attached to it, plus the TV remote of course! It's all boxed and ready for its next user.