I have just taken delivery of a Sharp VCR, model VCMH835HM. Picture quality and sound on playback are excellent but there is a very noticeable hum from the VCR. This hum is even there in stop mode. I know all VCR's make some noise but this is by far the loudest one I've ever heard and is annoying during quiet film moments. Anyone else had similar experiences? Is it standard on Sharp VCRs or have I got a duff model ?