It's been awhile, so I should report back as promised. I opened up the back of the Toshiba and easily found and replaced the internal fuse which davidjb and Old Car had suggested might be an easy fix. No luck with that, though, so the problem is apparently something else. I also looked around at the electronics while it was open and it was apparent to me that searching for loose or separated connectors and broken leads as keith_h suggested is really beyond my pay grade (I am not electronics savvy). Therefore, I just bought a 32" Samsung to replace it for about $220 at Target. Hopefully this one lasts a little longer, as tv repair is apparently not my thing. Moving on...thanks, everyone!
2013 Windjammer 3008W
2006 Chevy Silverado 2500HD 6.0L w/Equalizer 4
Nights camped: 2012 (29); 2013 (26); 2014 (40); 2015 (43); 2016 (35)