thanks sparky and kilroys.
i check earthing screws in inverter all ok.
i will change the stby botton as you kilros says.
did you have the same problem??.
i notice that there is no signal to the inverter.
signal apear only when stby botton is constentetly pushed and back light and screen apear.
tried sevarel time the reset procedur no cure.any other suggestion?.
willyam1.
ic in inverteris bd9777