I think my Hikey970 might have died, we recently had a power surge. When trying to boot I’m getting no lights. At first, I thought that I might need to do a Recovery. However, during the process I have noticed that the host no longer recognizes it. Checked my PIN’s a dozen times. I’m wondering if there is maybe a fuse that I can unsolder and replace?
There is no fuse. If something dies from a power surge, it would likely first be the power supply, next would be a buck regulator on the board. Have you tried a different power supply or tested the power (voltage) coming from yours while trying to power the board? I have had a buck regulator fail spontaneously on a hikey960.
Schematics are here. As you will see there’s an over-voltage protection chip and then an LED. No LED means something has broken fairly in the chain (or that the LED is broken ). Anyhow hopefully you can map to the board by relying on the part numbers. Certainly it’s worth reading power at the LED with a multi-meter.