You have a simple problem with the Vertical output circuit. Either No power to it, or the Vertical output has failed. I'd suggest a TV repairman, and most likely I would charge about $250 to fix it.
But I don't live where you live, therefore my inexpensive cost of living would certainly not reflect a TV tech's costs in your area.
To know how much your repair costs, I would advise you to contact different repairers and dealers to compare the prices. This is because the cost will vary from one place to another. Here you are a tech website www.tvrepairjacksonvillefl.com , maybe it can help to know the repair´s price.
nexx
November 2012