My Dell Latitude D630 will boot from the AC adapter, but not the battery. I've replaced the battery, tried booting with only one RAM card, etc. etc. I can't understand why, as my BIOS says the battery is fully charged. Windows does as well. It's not an OS problem, as I repartition my disk and install Linux at times. Any ideas? Thanks in advance.

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If you boot it up while attached to AC power, then remove the power cord, does the laptop stay powered on? – Amartel May 13 '11 at 18:24
No... not at all. Powers down immediately. – walle1357 May 24 '11 at 19:43
Oh! Forgot to say that if I put it to sleep, then unplug, it remains in sleep and doesn't shut down. – walle1357 Jun 18 '11 at 23:58
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up vote 3 down vote accepted

If replacing the battery does not solve the problem, the problem is confined to the portable (you could try replacing the AC adapter too, but that seems highly unlikely)

I'd put my money on a defective connector inside the laptop, that's either completely broken or that shorts out when a battery is connected.

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I thought it was a defective connector as well, I tried the AC Adapter, battery is 100% charged... etc. etc. – walle1357 May 24 '11 at 19:43
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