Not sure about 04s, but this is my story. 2003 Accord EX-L, 4 cyl, 4 door. At 70k kms all the lights on radio/cd changer/climate console died. All the controls were still working flawlessly. I tripple checked all the fuses under the hood and in the cabin to no avail. Did a search here and discovered that it's been a common issue with 03 accords. Went to a Honda dealer and it turned out they were aware of this problem and replaced entire unit ($800 Cnd) for free. I paid $80 for labor. Possible this problem has migrated to 04s.

Hope this helps