1999 Honda CRV Clock

Well it's hard for me to tell you what to fix when it could be a multitude of faults. The easiest thing to check would be your fuse. Check all your fuses in your fuse panel, one might be blown.

I've had the same problem with my 99 CR-V's clock. I took it out and opened its housing. Inside, you'll see parts on the board, including several resistors, which appear as flat components, about 1/4" x 1/8" that are black with numbers, like '103' or something like that. I forget the actual values. Anyway, you'll see that one or two have cracks in the solder. I just remelted the solder on one end, added some, let it cool, and repeated on the other end of each resistor. (I'm an electronics engineer so I solder all the time.) My clock has worked fine since. It's not dimming now, so I need to pull it and do the fix again. I'll add a post with a picture when I do so. I've done a similar fix in the compass module in a 2000 Mercury Mountaineer.