32in Toshiba TV problem...sound good but no picture

I have a Toshiba 32in colr tv and have had it for 7-8 years....this year it started to show staight lines only in the botom of the screen and this morning there is no more picture....I can only hear sound change channels...thats it.....I sometimes like to fix things myself.....does anyone know if this is an easy repair that I can do at home