I'm very pleased to say, I've replaced the lichtbulbs and the Beomaster is working great again.

Thank you all for your quick answers. This was very helpful. I going to replace those light bulbs.

I've got this Beomaster 1900-2 for many years. It was given me by my granddad and it worked fine for over 15 years, until now it started behaving strangely. The volume suddenly goes louder and a minute later is goes down again. The volume control light goes out when the volume goes up, and turns back on when the volume goes down again. Some of the