When TVs get dropped picture tubes can get internally damaged & then the
color will have a rainbow effect. If it has video & audio input then try
that first & use it as a monitor. Also look for cracks around the tuner
& flyback. The 19" TVs have come down in price to around $100 so it
might not be worth installing a new tuner. Try calling Sanyo to see
where you can get parts. Matt Electronics usually has low prices on
tuners.

"I have a Sanyo DS19330 TV that recently fell and the area where the
Coax Tv cable is supposed to be connected it broken. The unit (tuner)
needs to be replaced but I am having absolutely no luck trying to find
the specific part. I have searched the web for hours (with a broadband
connection too!) and have found nothing. Does anyone know where I might
find a tuner specific to this Sanyo model TV. I have the info from the
sides of the unit's casing if that would be helpful.
Bill