Sony Handycam DCR-HC42 Mini DV Digital Camcorder

If you are able to see picture in the viewfinder (eyepiece) on closing the LCD, then the cable connecting the LCD to rest of the camera has gone bad and needs replacement. Take it to a Sony service centre. They will charge Rs 750 for service charges and about Rs 700 for the cable. You can save the service charges if you replace it yourself, but I'll advise against it unless you are conversant with these sort of precision jobs.