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Sony KV-SW292M80 tv power led flashes 2 times and not start

power indicator flashes 2 times. H out transistor changed.but when power on, standby led becomes green and powercut off. Again, led becomes red and 2 flashes. power don't come on.

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Fülesmester
Fülesmester's picture

Hy,
 
When the STANDBY Indicator LED flashes 2 times:

 +B overcurrent (OCP) protection.
   Power does not come on.
• Load on power line is shorted, (Something is overloading)

Occurs when an overcurrent on the +B(135V) line is detected by pin 97 of IC001 (A board).
If the voltage of pin 97 of IC001 (A board) is more than 4V, the unit will automatically go to
standby.

Probable Cause Location:

• H.OUT (Q511) is shorted. (A board)
• IC751 is shorted.(C/CV board)

It can also be caused by elongation of the resistors in the current monitoring circuit, or the shorted LOT.

Check: R5022, R5023, R5026
Replace: C528, C538, LOT

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Juanita Devera

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