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If the picture is correct in black and white mode and sound is Ok, your TVs chroma section is in trouble. At present sets, this section consists of an Ic. That Ic may be not working. There are many reason for which chroma section cannot work. Consult an experienced technican to rectify the trouble. There is an oscillator section inside the chroma Ic which receives its oscillations from an ouside crystal oscillator, usually oscillates at a frequency of 4.43361879Mhs or 8.86Mhz or may differ its frequency according to the circuit designs of that tv. Your technician will detect it and rpace the same if needs. You yourself cannot detect the exact point of fault. It need digital multimeter which can count frequency also.
check the supply at horizontal driver trans former ,if voltage is correct at ho/driver trasistor ...then check allthe fusible resistances from power supply,,,if tv is taking h/oscillation for awhile ,,give more screen control in lot,,, & see for a horizontal line ,,,before tv becomes off,,, if so vertical ic problem...
your tv has defective power oscillator or the system tact switch.. and have abnormal voltage oscillator... this is the symptoms of defctive the sais above
ok ur tv has no second oscillation check all oscillation circuit. check the horizontal output! check the switching transistor around at the chopper supply.
It sounds like you have an integrated power supply issue. This type of supply truns on the horizontal oscillator which provides excitation to the Horizontal Output stage which in turn work with the HV section of the TV the extra LV levels are supplied by this interaction. That tsss noise might be the oscillator trying to work or the startup circuit trying to work. I would check the Horizontal and HV sections for failed components.
my tv could not contineou powering on ..it stuck in standby mode
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