That is likely correct. Lenovo has an article about it here: https://support.lenovo.com/us/en/solutions/ht505170-information-about-the-mild-tingling-sensation

That is likely correct. Lenovo has an article about it here: https://support.lenovo.com/us/en/solutions/ht505170-information-about-the-mild-tingling-sensation https://support.lenovo.com/us/en/solutions/ht505170-informat... We actually use a 3-prong AC cable to prevent this from occurring.