Hi
It sounds lamp is defective in your tv that needs to be replaced.
If lamp in tv has not been replace in last 2-3 years then replace it as it got broke or became dead and causing problem.
Lamp replacement procedure is easy and would be written in tv user manual. Required Lamp is available HERE, click for price info.
Hope these info will help you.
Thanks.
Could it also be the color wheel?
If its color wheel, lamp will lit for a while then shuts off. Check lamp's bright light at back of tv near exhaust duct.
I cannot find my manual. Is one available for download?
Yes, you can downalod free copy.
click Toshiba Support link to download copy of manual pdf file.
Let me know if any problem in downloading file.
Thanks
Please check page 103 ~ 105 of manual for lamp replacement instructions.
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