Diagnostic light blinks seven times, stops, and then repeats. I have unplugged set from power strip and used wall outlet, but it still does not turn on. Any ideas?
Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
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Thank you very much. 7 blinks indicates a "temperature" problem with the suggestion to clean the vents, which I did. That solved it. The SONY Trinitron is an excellent machine, still, after 13 years, and it is fortunate that I got it to work with advice from FIXYA.
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