Hello. New member, hoping to take advantage of the wealth of knowledge and experience here. I have a Yamaha C4 in very good condition (fully recapped, plus some additional work, prior to my acquisition). Other than occasional issues with the input selectors, the only problem I've got is that 2 of the three indicator lamps are out. I remember from the last time I had it opened up to clean the switches that the lamps appeared to be difficult to access. I'm guessing that the front panel, and maybe the two bottom boards mounted to connector assemblies, need to come off. Sure would appreciate any input as to whether or not I'm on the right track. I found some threads about replacement lamps for this unit, but nothing about the required disassembly. Thank you.