I think the reset hole is on page 52 of link.
As to worth, when folk are used to such things I've told them to find another one on Ebay. Yup. A few there.
I have a JVC GZ-MG20U HD recorder. I went to record and there is no visual on the screen. I know this is an old recorder, but would like to know if this is the CCD image sensor and if so, does that mean the recorder is worthless now (i.e. more expensive to fix than replace). Any info would be appreciated.