While you wait for answers, we may have found some information which could help you.
Click here for Lamp Repair ReplacementHave wired new ceiling light correctly but STILL wont turn off?
12v AC halogen lamp repair?
How can I fix my ikea floor lamp?
IKEA LIGHT?
Adapter buzzes, where can I replace it? Apart from the obvious?
Ikea Antifoni Table Lamp?