It sounds like an internal CCD issue im not sure though.
I know Sony has had problems in the past before with CCD errors like with the Sony VX2100 a lot had to be recalled to sort the situation out.
Best thing to do take it back to the shop and get your money back.
You can't really "fix" it yourself it sounds like a severe internal problem with the camcorder which can only really be fixed by an authorised Sony Dealer/Specialist.
I hope you kept the receipt...