Lars, to check the leak resistance of mains circuits you need a special "megger"meter.This is usually in the range of Mohms, so usually a normal multimeter shows infinite resistance (sometimes modern digital ones are capable of measuring this resistance).It's very dangerous to use something that gives you (even) a slight shock.If you find it's too much money to have it professionaly repaired (maybe a worn out cable that touches the frame?) then better trash it, than put your life in danger.
-- Tzortzakakis Dimitrios major in electrical engineering, freelance electrician FH von Iraklion-Kreta, freiberuflicher Elektriker dimtzort AT otenet DOT gr Ï "Lars" Ýãñáøå óôï ìÞíõìá news:9645D86505B0E51D7E@204.153.244.156...