Proview 998N Problem

[fm2209]

Hello,

I have a Proview DX-997N (998N) and sometimes the Monitor goes out (the Power-Led is off then) and you can hear a louder sibilance. When I then slam the Monitor a few times (near the button panel), the Power-Led goes on and then there is either a picture or Screen is still dark and I have to slap again until the picture ist there. The failure happens also when I turn off the Monitor and on in a little while. I have noticed that the failure now exists only when the Monitor is cold. When It has heated up (louvers are hot) then the Monitor works completly normal.

thanks for any Help,

f.m.