Laptops forum


Electrical mishaps related?

by daveinmd / June 17, 2015 8:01 PM PDT


Last week, I unplugged the Apple lightning cord from my phone and, while the other end was plugged into my Macbook Pro, put the cord down. The phone end of the cord touched a metal part on an old Dell laptop -- that was not plugged in and doesn't have a battery -- and there was a loud pop, accompanied by a red-hot fragment of metal that shot from the point of contact. The connector on the cord was melted, and there was a gouge in the laptop where the metal had been burned away.

This week, when I inadvertently plugged in the Dell's power adapter to an HP laptop, there was again a loud pop, and the HP went out and wouldn't turn back on. Granted, it was the wrong power adapter, but it has the same specs as the correct adapter: Both have a DC output of 19.5V (3.34A).

Are these two occurrences just coincidental? Or do they suggest that, in addition to operator error, there might be something seriously not good happening with the (old) surge-protector power unit, or even the AC outlet?



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Clarification Request
(NT) Well, WOW!
by itsdigger / June 17, 2015 9:09 PM PDT

All Answers

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Polarity also counts
by James Denison / June 17, 2015 8:24 PM PDT
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Polarity also counts
by daveinmd / June 18, 2015 7:54 PM PDT
In reply to: Polarity also counts

Didn't realize about possibility polarity differences, but both adapters have the same polarity. I'm usually exceedingly careful about what power adapter I plug into which device. But not this time. I'm just thankful for the very accommodating user support technician who said I just zapped the power supply -- and got me set up with a different company laptop.

Still nervous about the lightning cord connector packing such a powerful punch. I've handled USB cables thousands of times and never had one do such damage (or ANY damage) before.

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