I have a unique problem which no Electrician or Audiovisual / Computer technician has been able to resolve. The problem is distorted images and interference with HDTV signal and Electric appliances. When appliances like: Dishwasher, Microwave, Treadmill are turned on, the TVís in the house receive distorted HD images and dashes.
My house is about 14 year old.
Configuration: I have cable TV booster going into a 8 way splitter ( Howard 1000MHz ) the splitter sends signal to the TVís receiving HD signals.
The TVís receive signal through coax cabling wired all over the house.
All appliances ( dishwasher Ė Treadmill - Microwave ) are on a different circuits.
Problem: When appliances like: Dishwasher, Microwave, Treadmill are turned on, all TVís in the house start receiving distorted images and dashes.
Tried:
Electrician checked out the voltage and circuit board, electrical panel. Looked all ok to the electrician.
Network IT Ė Tried different booster, Splitter, cable ends.
Line conditioner on the treadmill did not work.

Problem still persists. Everyone has given up.

Please help.