Narrow wavey picture across screen-has good sound and color
When first turned on, the TV has a narrow wavey picture across the screen. The TV has good sound and good color. After a while when the unit warms up the wavey picture will clear up and fill the screen as it should. The TV will be fine all day long until you turn it off and let it cool off.
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You will need convergence work to this unit. Not cheap.(Not recommended for DIY unless already experienced in this type work). Might contact a local servicer experienced with Toshiba & see if they can give you a quote over the phone. Be sure you are sitting.
This is probably a good time to consider entering the 21st century & look at LCD or LED flat screens.
Change horizontal driver buffer transistor's and capacitor's. 7461 7463 transistor's. Caps 2455 2405 near transistor's.
Please leave your email address, I will try to find the service manual for you.
With no video and the the colored stripes, it sounds like the LVDS cable needs to be reconnected to the LCD control board or the control board itself is bad. If the unit is only 3-4 months old, it should be covered by warranty
Sounds like your set has dried caps in the Power Supply, take it to a decent tech, its not something you should try to do yourself as dangerous voltages can still be present evn if the set is unplugged.
I just fixed this problem on my neighbor TV. I don't have a manual or schematic, and didn't pay any attention to the reference designators, so I will just have to describe it. The problem was a bad solder joint. Visible thermal fatigue. Looking at the main board, (didn't even need to slide the cassis out). There is a small, narrow, vertical board in the center, adjacent to the yoke connectors with a funny looking little transformer on the very top. Check the connections on that. -John