JTM 60 boost channel not working HELP???

[torcamaniac]

Hi,
I have a JTM 60. It has some mods as those gunnar posted here on Metro (diode clipping etc.).
Now my boost channel doesn't work anymore. After turning the volume and gain pots to max there is loud buzzing and you can here a dry sound from guitar in background. Very low and no distortion. Clean channel works perfectly.

1) checked the tubes and swapped them all good and glowing. Also checked the Voltages on V102 tube pins
2) checked the PCB soldering and visualy all components look fine
3) checked the pots
4) checked the relays. Good but replaced them anyway
5) replaced the majority of caps and resistors on the V102 stage
6) replaced the bridge rectifier for a better one
7) replaced all preamp tube sockets with high quality ones

Can anyone help? Any ideas what else could be wrong?

[SteinRR]

I'm sure you already found the fault, but if not you should check the wiring between the PCB's. I have been modding my JTM60, and found a break in one of the cables (although it was the clean channel not working for me).