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From: zhaowu on 4 Sep 2006 03:36
I have a Philips 27" TV (model number: 27PT643R37A, chassis number:
L01.1UAC). It first chirped when powered on. I found the HOT (7460 -
BU4508DX) shorted, but after I replaced it, the HOT got shorted
immediately again after I turned on the TV. I've checked the three
H-drive transistors (7462 - PDTC143ZT, 7461 - BC337-25, 7463 -
BC327-25) and all the surrounding diodes, resistors and capacitors
including 2455 - 47uF/25V. In fact, I also replaced 7461, 7463 and
2455, but the HOT still got shorted immediately.

Could the culprit be the flyback transformer or the tube? The TV is
only 3-years old. What can I do to pinpoint and fix the problem?

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