Jack wrote:
I have a 35" Toshiba TV. It's about 10 years old. I just turned it on and
all I see is a horizontal white line across the center of the tube.

In one of my TVs that same problem was caused by a bad 180V
electrolytic capacitor in series with the vertical yoke, but in another
a transistor in the vertical output chip blew. The chip was $15, but
some local places wanted $50. Fox International, MCM Electronics, and
other sources listed in the www.repairfaq.org are usually cheapest.

Many libraries carry Sams Photofacts schematics, either on paper or
online, but it shouldn't be that hard to find the vertical output
section by tracing the wires from the yoke and looking up the part
numbers of the transistor or chip to find out their functions.
www.nteinc.com has information for a lot of those parts.

Be careful about letting the TV fall forward and making the CRT shatter
and explode.