i have the exact same problem on my 03 accord, I think it may have something to do with a aftermarket head unit, I got a alpine hu installed in the lower dash about 3 months ago and a few weeks ago I got the same problem, I can still see the illumination it is very very dim. I am about to take it to the dealer when I get a chance, but they'll probably say the the same thing, they can't fix it b/c of the headunit i got put in.