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Have an HP G72-B63NR Laptop about 1 1/2 yr old not under warranty I'm working on. It does not have power tried a different power adapter, no power, tried a new power jack, no power. Tried removing battery and holding power button and plugging back in still, no power, with or without the battery. I'm thinking it's a motherboard issue possibly with the gpu. But would like to get more ideas if there may be anything i overlooked.