I’m struggling with a dead Canon EOS-1D Mark II . The camera is completely unresponsive. I’ve already tried all the basics: fresh NP-E3 battery, checking SD/CF door switches, and replacing that "terrible" internal backup coin battery.

One weird symptom: the battery icon on the sub-LCD blinks very briefly ONLY when I pull the battery out.

I suspected a blown fuse on the DC/DC converter board (CG2-1255) and took it out. According to the service manual, there are four fuses: F001, F002, F003, and F201. I’ve already located F001, F002, and F003 and confirmed they have continuity.

However, I cannot for the life of me find F201. The area indicated in the service manual seems to be occupied by a component that looks like a diode (marked "T1 61" or similar), and I’m hesitant to bypass it without confirmation.

Does anyone know the exact physical location of F201 on this board? Any photos or guidance would be greatly appreciated!