U400 killing power cords

My u400 is killing power cords.  It's killed 3 in the last 3 days.  I've tried different outlets, used surge protectors.  But every time I get a new one it charges for a bit, then stops - and when I have the power cord tested it is dead.  What's wrong?

Dear kmoore
Welcome to Lenovo Forums
From where did you purchase the machine , and why you need to use surge protectors
if you did purchase it from US i advicce you to contact the Service Centers in order to this issue will be sorted there
Thanks
Alaa
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