Entertainment Center: TVs, Stereos, VCRs and DVDs - RCA 32" TV (blows horizontal output)

I am working with an RCA model 32F530T TV.
The chassis number is ATC113-CD4.
The unit makes a constant chirp noise when plugged in.
I checked it out and found that the horizontal output
transistor was shorted, its a 2SC5148 with no internal
damper diode. I checked the surrounding components
and solder joints all appear to check ok. I replaced the
transistor but when I plugged the unit in it popped the
transistor and started chirping again. I'm thinking
that the flyback may be at the source of the problem.
However I have seen so many replace it in cases like
this just to find that it really wasnt problem and I dont
want to be among them. (Any help would be apreciate)

Something I noticed when replacing the HOT is that they didnt
use any heat sink compound on the transistor surface.
Is there any reason why I shouldnt use any?

The flyback transformer is the # 1 problem with this model set.Don't need heat sink paste on hot,does not run hot in this set.

Thanks for the reply,
I'll see about getting a flyback.
Do you have any experience with ASTI or HR Diemen brand
replacement flybacks? Are they ok or no good?

I used to use Asti,they are good.Never bought from the other guys.:)

A new flyback and HOT got it running.

Thanks