I just had to replace the bulb in mine easy to do
Need to get a flat screwdriver and gently prise OBC out while reaching under and poking your finger up through a hole below the OBC and pushing .. Mine was a little tight and took a little force but not overly much. Got 4 bulbs to replace them all so would all be same brightness from repco 2 of them wouldn't quite fit tho grrrr $3.10 each .. just had to wait for them to arrive from Invercargill