Philips 37''pf9975/12 plasma tv on off switch takes 20 to 30 goes to come on many thanks !!
Your power supply is probably failing, and will need replacement or possibly repair. If you're very good with a soldering iron, and very comfortable inside a TV, you might ba able to repair it yourself, but I would really recommend that you take it to a professional be cause it's easyy to get something wrong and cause a more expensive repair.
Testimonial: "many thanks help very much !!!"
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