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Another probably stupid question....about interference

Just found a better solution. I found a name brand HP power brick that put out the same voltage, -.5v, with a different laptop connector on it. I cut the end off the noisy one, and spliced it onto the HP brick, and its silent running. Laptop is charging/running normally. Old one was 20v....new HP one is 19.5v. Laptop doesn't seem to care.....and there is like zero measurable noise with this one.
 
Just found a better solution. I found a name brand HP power brick that put out the same voltage, -.5v, with a different laptop connector on it. I cut the end off the noisy one, and spliced it onto the HP brick, and its silent running. Laptop is charging/running normally. Old one was 20v....new HP one is 19.5v. Laptop doesn't seem to care.....and there is like zero measurable noise with this one.

I'm probably being overcautious but does the laptop have a lithium ion battery? You have to be careful about using just any charger with them.
 
i should have made a separate thread for my problem sorry. did not mean to hijack your thread.
 

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