It's not an MOT failure for a speedo bulb not to work. As to what the problem is, more than likely a blown backlight bulb, seeing as the others are still working. Depending on how mechanically competent you are, something like a Haynes workshop manual will tell you how to change the bulb. If you don't want to buy one, then some Libraries have copies which you can borrow or photcopy the relevant pages.
Edited by Dynamic Dave on 02/10/2008 at 01:18
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