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Your bulb might have blown, these TVs are getting pretty old. I would personally not invest any more money into it as new TVs are much better and cheaper (it might cost as much to replace the bulb as buying a new TV) but if you are not technically savvy you would probably be better off replacing it. I will be doing that when my bulb blows, which could be any day :)
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Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ Do a search by type in the brand name of your device at its search box.
The only thing you can do is to unplug the tv for 30 min. Then turn it back on and see if that fixed it. If not call a repair man, you are most likely missing a power supply voltage or deflection voltage.
the scan derived voltages are running ,not firing up the b+ voltages for remainder of the set to operate.pop migt have a cap ,ic etc. service required .
Toshiba did have a problem with a protection ic that would fail. It is possible that this is the problem. But some trouble shooting will need to be done buy a repair shop.
you didnt say if the set was working?? if its not I would first try the power regulator IC in the power supply It will start with an STR#####.. This goes bad alot in these sets. Good luck
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