hifi engine

Akai GX-4000D

I have acquired an Akai GX4000D and when powered on the VU meter lamps do not light. The VU meters work perfectly as does the rest of the machine. I have managed to get at the VU meters but it appears that the lamps are an integral part of the meter - there a also a voltage on the lamp leads so they are being powered. Anyone any advice on what I should do to get the lamps either replaced or perhaps replace the meters.