E39 Touring indicator problem

Can anyone help here??
I have taken it to three BMW dealers here in Wales,the first charging in excess of £280 just to look.............the second simply gave up,the third said I needed a complete new dash!!
The indicators work....but do not show up on the dash,neither do I hear the clink-clack in its operation.
Some times.....they'll work fine.....but for the last few months....nothing heard or seen....
So if the indicators have not cancelled,I cannot see them flashing away until someone "tells" me.
Any thoughts anyone??????????????????????
I'm certainly not buying a new dash...if I cant get it sorted,I'll just put in a flasher light that works off an indicator....
Thanks
Alan..