Rear projection tv has sound but no picture for the first hour

Shop repair and very unlikely to get fixed in home

Lamp or Lamp Fan For replacement Lamps Call Mats Electronics 1-800-628-1118
for other Parts/Boards Call Encompass Parts Distrubtion 1-800-638-3328

Replace Lamp!

Go to a repair centre, some parts must be fixed/replaced.

have toshiba 43vh9ua picture is purple to blue in colour does anyone have a fix... thanks nev

Common problem - Its most likely the HVG on this model. www.TvRepairKits.com has instructions on how to get it fixed.

Sounds like your convergence modules have gone bad. They have 21 close spaced pins to unsolder and resolder. You'll need a soldering iron with a fine point tip and thin gauge solder to do the repairs yourself. Solder bridges between pins are common when soldering these module pins, so have some unsoldering wick handy if you're going to fix it yourself. You can get parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

power supply is bad

 
I had the exact same problem. The screen would shrink then expand. After thrity minutes it would correct itself. Then one day it just broke - no sound and no video. I searched these forums but did not find clear instructions on how to fix it. I gave up and called in a repair tech. He fixed my TV in less than 30 minutes.  To help others like me I documented the fix and created a step by quide and repair kit to fix the problem. You can find it here. http://www.magnavoxhelp.com

sounds like a loose connection, check splitter RCA #205064, Q4101, U4101, C4102, C4118, C4108 and convergenc ic for loose connections

take the back off and check the fuse...