TV/VCR/Stereo Troubleshooting/Sony kv-27s42 tv

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Expert: Rick Montgomery - 11/2/2009


Question
standby lite on front of unit flashes 4 times and then repeats. TV does not turn on. This is a Sony TV model KV-27S42. it is approx 7 years old. TV was not moved or bumped when this started happening. thanks for any help you might be able to provide./

Answer
Robert,
  The 4 blink error code refers to a loss of vertical deflection. The failure could have been preceded by the picture pulling in from top to bottom, or by going to a thin line across the screen. Start by carefully resoldering the vertical deflection IC. If that doesn't do it, replace the vertical IC. The reference number is IC541. The part number is TDA8172.
regards,
Rick

TV/VCR/Stereo Troubleshooting

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Rick Montgomery

Expertise

Most questions about 1970's-1980's audio equipment. Most 1980's -1990's VCR's and VCR combo's. Most 1980's-1990's car audio, except original equipment. I know name brand after-market such as Kenwood, Pioneer, JVC, and some Sony. I am not so good with TV's, DVD's or camcorders. I do not work on Projection TV sets at all. I also have no access to documebntation for sets outside of the United States.

Experience

Professional Electronics Technician since 1975, specializing in most audio, home, portable and car. Also all VCR's. Limited TV knowledge. No projection TV experience

Organizations
Through work, NESDA.

Publications
n/a

Education/Credentials
High School. Graduated with 2 yrs Vocational Electronics in High School.

Awards and Honors
Certificates of completion of factory training seminars for various brands

Past/Present Clients
Thousands of customers to the Service Centers I have worked for.

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