Single vertical line on sumsung led screen

Dominique_2

Estimable
Jan 12, 2016
1
0
4,510
Just after cleaning my 40inch sumsung led tv and reconnecting it,l strangely noticed 3 vertical lines at the left corner end. Blue,Red and Green....after sometime..the blue and green thin line dissappaered...living behind the red one,which it seems permernent.Have tried to switch my unit on and off severally but the vertical red line wont dissappear at all...what could have happened to my unit?