Possible monitor burn-in ?

Hi, been using my Samsung SyncMaster 2493HM for about 2 and a half years now and after cleaning it today i have noticed 2 lines at the top of the screen, they appear to line up with the toolbars

Potential screen burn in or image retention? Happened suddenly and displays on multiple inputs/ devices. : r/Monitors

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Burn-in? Nope!

Here's a strange one (spontaneous instant burn in) - TR Forums

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