mj mj posted an answer for this Electrolux Ewf1090 Front Loader Belt Part No:1323531309:
"when the unit sense a strong vibration it automatically stop the unit. unplug the unit and..."
mj mj posted an answer for this Logitech Z-2300 2.1 Computer Speaker System (3-Piece):
"that 4 pops sound is a built in feature of the new system ."
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