My switch wont display on tv when docked.

I put my switch on the docking station and it wasnt charging nor was it showing on the tv. So i ordered another docking station ( different docking station that’s compatible with switch). It charges the switch and was on the tv but now it doesn’t show on the tv at all. I tried different hdmi cords and changing hdmi ports on the tv. Still nothing on the tv but it charges it though and has a solid indicator light that it should switch to tv mode. I think so.ething is wrong with the switch. How do i get it repaired