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What country are you in, and what charger are you using? US 2-prong? I saw this once with a 2009 MacBook Pro when using the charger with the 2-prong adapter. A
by mwint 4y ago
What country are you in, and what charger are you using? US 2-prong?
I saw this once with a 2009 MacBook Pro when using the charger with the 2-prong adapter. A 3-prong grounded adapter would fix it.
- kcartlidge 4y agoMy 2021 M1 Air has it now, as I type. It's a standard UK 3 prong plug going into one of the Thunderbolt ports. My remaining older laptop, a 2012 Air with MagSafe, also has it. Unless I add in the power adaptor extension cable. For clarity no non-Apple device does this, including several (now retired) Chromebooks and ThinkPads over recent years.
- mwint 4y agoWhat happens if you touch exposed grounded metal on your Thinkpad (housing of a USB port, maybe)?
- kcartlidge 4y agoOnly ever happened with my Apple stuff, and no longer have the ThinkPad to try your suggestion.