Hello everyone, I bought a 1999 Ibanez rg7620vk off eBay. While it is a terrific guitar in terms of playability, I am having problem with the electronics. The tone knob on this thing is like a volume knob. Even if the volume is at 10, if I turn the tone knob to 0, there is no sound . Also, the sustain is very low. I can hear a very faint sound for a longer period but as I said, its very faint. I believe too much signal is getting away into earth wire. I checked the wiring on this guitar according to the diagram but it seems fine to me. I have a little experience with wiring dimarzio pickups but cannot find a solution for this problem.. Any help would be appreciated.