I have a problem with the back-light on a 12-years-old PHILIPS 42PFL7404 TV with DELTA DPS-298 power supply. Screen time is 11000h. A month ago the image started to flicker slightly and after a minute it turned off, but keeping the audio. It was necessary to disconnect from the line to turn it on again, with the same symptoms (Error code:17). The PSU seems to have all the components and welds fine. For a while I ran it without the back cover and it held up well without shutting down. With a heat fan I looked for the susceptible area and found it in the return circuit and supervision of the power supply (everything related to the zener IC953 and the opto PC901); when warming in for 5 " at 100ºC the same phenomenon occurred and it turned off.
If anyone has had this problem or experience with this power supply I would appreciate an answer.
If anyone has had this problem or experience with this power supply I would appreciate an answer.
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