M1 MBA Non responsive after power surge, but holding idle temp
We recently just had a lightning strike to our house, and it took a toll on our electrical system. One item that was affected was an M1 MacBook Air.
The MacBook Air was powered on and plugged into a 3rd party charger when lightning struck. Shortly after I noticed it was just unresponsive, black screen, looked powered down. I assumed it was just fried, but did some troubleshooting on it.
I tried powering it on normally, power cycling (holding power button for 15 seconds with no power in), swapping different chargers while continuously attempting to power it on, plugging in peripherals to see if I could get power out, and I got nothing. I would have tried NVRAM and SMC reset but that doesn't seem to be an option for M1 macs.
I finally opened it up to look inside, and it just looked normal, although I didn't do a lot of digging. No fans to check because this model just doesn't have fans. However I noticed the CPU/SoC heat sink was hot. I thought it could just be since it was powered on recently. I got a temperature probe though and let it sit for an hour or so, and it kept an idle temp the whole time at about 30° C.
I tried powered it on/off again, and it still had no response. I finally disconnected the battery, and the SoC went stone cold. After reconnecting the battery, hooking up a charger, and trying to power it on again, the SoC stayed cold and I couldn't get it to respond or 'power on'/heat up again.
Apple store techs tried to help troubleshoot, but their diagnostic computer couldn't connect to it and so they stopped there.
By the idle temp it appears to me that the SoC was running at some point, but it's like it's in a coma and nothing will respond: no display/backlight, no power out, and I'm not even sure if the power button works because I couldn't shut off the SoC and now it won't come back on. I don't know a whole lot about M1 MacBook's logic boards and power supply systems, so I'm not sure where to go from here.
Any ideas?
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