Sony kp-51ws510 has no pict but sound

I have a sony kp-51ws510 rear proijection tv. was working ok, but the picture was offset (pic was about 2in too low and to the right, leaving  an L shape boarder on the top and left) so i went into the service menu to adjust the Hpos and Vpos.  after finding it, saved and  worked well, on just that input i set. changed inputs after that (not in service menu at this point) and the screen got all messed up on other inputs. so tried resetting the service menu and lost picture on all inputs. What can i do to fix this now?