If the "noise" is definitely from within your deck, start searching for a cold solder joint on the board, a crack, an eroded track on the circuit board, essentially something that might break a connection for a shield ground. While looking, also inspect the tape head carefully for damage or excessive play in the bearings. Slight axial play is normal, but there should be no perceptable radial play (perpendicular to the axis/shaft of the motor).
: I am having problems with the subject vcr. When the VCR is turned on there are several, barely legible, vertical lines from the top to just below the bottom of the screen. When taping on this vcr, the lines are of course transferred to any tape made using this vcr. Any suggestions?