TV switched off. Small spring noise of switch release.
TV switched off with click
Switch on the TV, a little metallic.
Electronically controlled gas heater, Japan, 2009. Numerous switch on/off versions.
Beard trimmer, switch on, electric razor
16MM reel to reel film projector, switch on light
Computer printer, HP Deskjet D1470, switched on.
Computer monitor being turned on
Fan, switch on, no actual fan noise
old tube radio switch on, off with hum; clock tick in background.