Hi Bob, Many thanks for the tip. White screen appeared last week after 3 or 4 years of good service. Thought it would be a scrap job (or costly repair). Tried your 'fix' and after first rap it was better but with a bit of 'noise' on the display. Gave it another good tap and 'hey presto' a perfect display. Will be in touch when anything else breaks!!! Thanks again - Brian

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