Konica C6000l no toner problem

[blazy]

Hello,
I have a problem with konica C6000l, worker noticed a little bit of smoke from around toner supply pcb. And now I have an error that the toners are empty(KMY). When the machine starts to adjust I get an error for toner density is out of value.
I have tried to replace toner supply pcb with no luck.
What can I try to diagnose problem further ?
Do you guys think that there are problem with one of the motors for toner suplly?
I know that it's old machine but the quality of prints are very good.

[Synthohol]

not sure if relevant in this case however if the toner door is detected to be open, the toner will never add to the hopper.

[Ziggy]

Sounds like you let the magic smoke out. Good luck :>)