The "STEREO" and several of the source bulbs (FM and PHONO 1) were burned out. Original values were bayonette bulbs at 8 volts, .25 amps. I replaced them (per a suggestion in AK) with Radio Shack 14 volt, .24 amp units. That worked fine. The fuse-type bulbs which light the main panel are the problem. 3 are OK and 1 is out. I see no easy way to get access without a big disassembly job. Every time I do that and reassemble I have parts left over. Scares me. Another member - mea2112 - has kindly offered to review his manual and offer guidance on this and several other issues with the SX-990.