A:AnswerIn the back of the unit near the plug is a standby button, which essentially is the power button, it needs to be pressed in. This button will always stay pressed on or down. So when it is not being used it will go into standby mode. The turntable will always be on.
A:AnswerNot sure but I googled the model and the cartridge and it shows replacements for sale. So sounds like it is. Further google research should give the for sure answer you’re looking for.
A:AnswerI have observed a warping sound on 1 out of 40 vinyl records. I attribute it to the condition of the album and not the turntable. If you experience this issue playing every record and the condition of the albums are not suspect, then I'd pursue investigating potential defects in the turntable.