If you have the flyback tester then it would be easy for you to test the horizontal driver transformer. The testing method is the same as when you test on the smps transformer. The horizontal driver transformer primary winding is not as high as the smps transformer thus you cannot expect it to show many LED bar from the test. A good one sometime only shows one bar while to some it may go up to few LED bars.
Test also the primary and secondary winding with ohmmeter just to make sure the winding is not broken internally. Secondary winding have very less turn thus your result is the LED bar may not light up at all! Please take note of this and do not think that it has problem. I have repaired thousands of CRT Monitors and so far i have only seen few bad horizontal driver transformer and the problem was open circuit in the primary winding.
Well, hope with this repair tips, you can easily test horizontal driver transformer less than a minute. Take care bro
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