Hope someone can help with this. I'll keep it as short as possible.
The problem: Last night, after 3 years with no problems, my study lights (2 halogen bulbs running off the same switch) initially flickered for about 2 seconds, then came on fine. Last night, I switched off for about a minute then switched on again they came on fine first time. Switched off overnight. This morning - tried again and same thing happened - initial flickering then fine ever since.
So far as I know, they run off a transformer in the ceiling space. I did have trouble with them about 3 years ago but replaced both the transformer and the dimmer switch for a simple off/on and no problems up to yesterday.
Any ideas what might be causing the initial flicker then all is well?