I was given a nonfunctional SR1000 that the previous owner said would blow a fuse on power up and smoked diode Q810 on the power board. He replaced the fuse and diode but the same thing happened on power up. It is now missing that diode and capacitor C809. I have the service manual but neither of those components are on the parts list. The schematic shows the cap value as 220/16V but the diode is not on it. I'm wondering if there ever was a diode on the board. It does light up when turned on. I am approaching this as more of a "see if I can fix it on my own" type of project. Any suggestions would be appreciated, thanks.