A75 s231 won't run on AC power,r help please

My A75 s231 can't charge battery and run laotop at the same time. It charges battery ok when turned off and the battery will run the machine ok for a couple of hours but battery runs down while machine is on and plugged into power pack. The right charge light will come on as soon as the unit is turned off and charging resumes. If you pull battery unit will not power on with ac power. I replaced the power jack, the battery and power pack, all are new (no change) When on AC power system monitor shows that it is on battery power and that the battery has 0% charge. The system is XP Pro spk2 not OEM??? Any ideas any one?
Thanks Bruce

Try following the steps in this article.
Battery not charging or being recognized
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A75 s231 won't run on AC power,r help please

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