When any electrical issues presents it's self you're not comfortable repairing yourself.
Because you've added something that overloads your existing circuit.
Call an electrician.
We can add outlets behind your TV, we can install quad outlets, call for a consultation.
There are many reasons this could happen. Your circuit could be overloaded, your breaker could be going bad, your circuit could be improperly grounded. You should call an electrician immediately.
If it's hot to the touch or anything abnormal is now happening.