Hi all. At the weekend I bought a Boss RV-5. I have noticed that when I use it with an isolated power supply (with plenty of mA), or a battery, I sometimes get this whine that sounds like the noise you would normally get if you had digital pedals on daisy chains. It's not super loud and it only seems to appear occasionally, usually after I stop playing notes but leave the pedal switched on afterwards. Changing the "effect level" changes the sound sometimes, where if the effect level is up, the whine has this oscillating sine-wave kind of shape to it, and then when I turn the effect level down to 0, it changes into a constant whine. Turning the pedal off, the whine carries on only for as long as the decay continues (so it continues with the reverb trails). When the pedal is off (trails have finished) there is no noise. It isn't a very loud noise but was enough for me to notice it as I'm used to my pedals being silent. Also, when I opened up the bottom of the casing, the circuit board kind of just hung down with gravity -- it wasn't secure. Is this normal with some Boss pedals (doesn't happen with my DD-7)? Does anyone else have this experience with the RV-5? I bought it new. If it's normal then I'll know not to worry and can put up with it. Thanks.