From there we go on to start changing electrolytic capacitors in the power supply, again this is something that has to be done carefully and the tools required will again set you back more than the organ is worth, but it may be essential. Be very careful when doing this near the power supply and amp as there are lethal voltages there.
Unplug them, give them a squirt of Caig De-Oxit, leave them for a bit and then plug them back in. Usually we start by looking inside and cleaning any internal plugs and sockets. If you want to have a go at fixing things yourself, we can help. The exact model number, as shown on the maker's plate on the organ (often underneath the keys, so kneel down near the pedals and look up!) will tell us the age and maybe give us some ideas. The term Funmaker covers lots of models in the Wurlitzer range. I hope that you'll be planning to keep it in the family and use it! If you're thinking of fixing it up to sell it, don't bother, as you'll make a loss. Only you can decide how much you might be willing to spend out. Sentimental value, as something that's been in the family, is something that you can't put a price on. Getting it fixed professionally will cost more than the organ is worth. Just be aware that, if you go for professional help, the true value of the organ, even when fixed, will be almost zero.