I'm using an UNO as an ISP to program an attiny84 on a PCB I made. I'm able to program it when two op amps aren't connected to the SCK and MISO pins, but when I solder the op amps to the board, it says "programmer not responding"
I'm confused because I made the same circuit on a breadboard and the programming worked fine. Any ideas on why it's not working on the PCB? Also, what would be the solution so that I'm still able to use ISP to program the attiny84?
Here's the schematic: