Calvin wrote:
Deryck wrote:

I've got a bed side lamp which, in normal operation, if I touch the
base once it comes on, I touch it again it gets brighter, I touch it
again it gets brighter still, I touch it again and it turns off.
Except now, after changing the bulb, it is always on and at the
brightest setting. Before I cut the flex and put a switch in it can
anyone suggest what the fault may be and how it could be repaired? I
could just sling it and buy another but it is one of a matching pair
so I would probably end up buying 2.

TIA,

Deryck

My guess is that it doesn't like the new bulb. What sort of bulb was
in it before? Conventional or Enery Saving (CFL)? What wattage?
What sort have you put in it now?
As an experiment you could try a boring old conventional bulb just to
check.

I've X-posted to uk.d-i-y as there are many posters there who might be
able to help.

The triac probably went short-circuit if the old bulb blew.
It is usually a metal-tabbed device such as a TIC226.