Phosphur burn anyone? CHANNEL 7 and 9's cricket and tennis coverage is burning a lasting impression into plasma screens across Melbourne. Angry owners of the expensive digital screens, who have paid up to $6000 for their sets, are considering legal action against the commercial stations. They say their TVs are being permanently destroyed because the channels allegedly used static logos, which they claim have burned the symbols into their screens. "Your arrogant and bold (logo) bragging are having the opposite effect on your audience," Rye man Wayne Speirs wrote in a letter to both stations. "We're very angry." Mr Speirs bought the $3000 plasma screen on Christmas Eve. It now permanently bears Nine's dot logo in the top right-hand corner -- a legacy of the cricket. It was matched by a Channel 7 sport logo last week, which appeared after one day courtesy of the tennis. Sports fan Robert Tripodi, of East Keilor, also feels burned. His $6000 Pioneer plasma screen has been re-branded with the bright white "Sport" logo used by Seven during the tennis. A Seven spokeswoman said screen burn was rare. "But if you do experience difficulties of this nature, turning down the contrast on your picture will reduce the problem," she said.