Hi Mike,
I have attached a screenshot from my logic analyzer showing the IC29 outputs
( channel 0 = Y0 , channel 1 = Y1 and so on ).
There are little or no signals on Y3 to Y7 so it must be the memory check .
Does that mean the problem lies with the 8155 or the 6116 ?
your help is greatly appreciated :)
![Re: [korgpolyex] another dead 800](/yg-archives2/raw/korgpolyex/attachments/1463886266/969341089-ic29.png){kind=link}