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Samsung 370R charging motherboard issue

I have a Samsung 370R laptop that doesn't want to charge or stay on mains power.

I've metered the charger at 19v, so all good. No broken connections in the cable that I can find.

I've replaced the charging port, to be in the safe side. No joy.

It only says charging for a split second when plugged in, then discharges.

When it does boot up I adjust the brightness, but no matter what I do it stays the same brightness. Boots into windows and Linux fine.

I'm assuming the motherboard is fubar?!

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If the device won’t charge, the battery may be the source of the problem. I would replace it before swapping out the motherboard.

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I previously removed the battery thinking that it would boot without it (using charger), however, due to the power issue it only booted up for a second then switched off. I had assumed that powering the board direct should have been ok?

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You're right, a direct power connection should work. I know you tested the cable already, but since replacing a motherboard is so expensive, is there another cable you can use just to make sure?

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Dave C estará eternamente agradecido.
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