Hi,
The problem could be anything ranging from a blown fuse to (more likely) your horizontal output transistor having been shorted by the power surge, to (just as likely) a blown bridge rectifier circuit.
The horizontal transistor feeds voltage to the flyback transformer, eventually giving width to your picture; the ridge rectifier changes your households' AC voltage into DC (which is what your TV requires). Both are dangerous to measure, and if you are not a technician I would highly suggest you don't even try. If you take the unit to a repair shop I don't think the cost would be over $150 (if either of these problems is indeed what you are experiencing).
Grahams' TV Service
West Columbia, SC
Jim Lee- technician, May 2004
