picked up a sansui 5500 receiver at a thrift store - everything seems to work but a few of the display lights. How easy is it to replace those bulbs? Or could it be another problem beyond the bulbs? The tuner display does not light, but the needle does. One of the dials on the left side lights, the other does not. A budding neophyte here, but i'm willing to try and repair if it is relatively easy. Thanks for any insight and help!
