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System won't work without battery

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I'm at a point of confusion on an HP laptop. The battery won't hold a charge, so it won't fire up if not plugged in. BUT, if we take the battery out, the system won't fire up even if it is plugged in. In other words, the dead battery AND the cord have to be in place to turn the system on. Ever seen that? What would that mean?
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    Grumpy Ol' MSgt (Ret.)

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Ever seen that? What would that mean?

Yes, I have seen this and it is often a design feature, not a fault. All power supplies require a proper load to work properly. Some notebooks are designed to supply a full load without a battery, other notebooks use the battery to help provide a proper load. It just depends on the design. Check your notebook manual to see what it says.
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