Unlikely. The interference from the electric motor just worked because analog TVs used to recieve a (weak) analog signal via antenna.
That may be right, like I said Im not an expert. But when I was a kid we had a tv that misbehaved when the washing machine was working even when watching through composite.
Could be interference from the vacum. Some old tvs and depending on the electrical circuit they are plugged in dont like when high powered devices are running. A bad electrical circuit can aldo cause this, try plugging it to a regulator.
Badly tunned. Some tvs allow for fine tunning of the chanel they are "listening" to
Bad cable, even if it works on other tvs. Some tvs handle "weak" and/or "dirty" signals better than others.
Bad modulator. Same as cable
Bad tv. In my experience capacitors die and can cause those kinds of failures but I wouldnt recomend poking inside a crt tv if you dont know what you are doing.
With this command:
After I used the command the window list applet stopped working but a reboot fixed it