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When you replace the transistor, resolder all the connections around the transistor. If there is a small transformer (not the flyback) connected to this transistor, resolder that. That little transformer is the horizontal drive transformer and these were bad to have loose connections and blow the HOT in Sony TV's of the period.
I know what you mean about having to order two parts and pay $9 shipping! Most of the places I order from have at least a $25 minimum order with at least $8 shipping. I usually have to order more than I really need just to get one $4 part! The good thing is that you'll have a spare in case the first one blows or if you need another one later.
Anyway, do well on those exams and have a Merry Christmas and a safe vacation!
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