I have a Panasonic DVD/VCR Recorder,model DMR-EZ48. I played an older tape and I needed to adjust the tracking manually, however I overdid it and now I have lost the picture altogether. I tried to get it back by + and - and also tried the auto tracking by pushing the up and down channel buttons simultaneously. I would appreciate any help to get the picture back. I have tried to play other VHS tapes with the same result. DVD's play normally but not the VHS tapes. Many thanks.