The motherboard battery is just a little round battery that you can buy at almost any retailer in most pcs. The model number to the battery is usually a CR 2032. This battery does not receive any power from your power supply. Have you noticed your PC loosing time over the last few months? This is usually a good indication that the motherboard battery is dying. The lights that you refer to though should only partain to the rechargable battery of the notebook. During the past two weeks while the red light was on, was the AC adaptor plugged in to the laptop and plugged into an AC source? If your AC adaptor has been plugged in and is not charging the notebook battery then there could be one or both of the following problems: your notebook battery could be bad or your AC adaptor could be bad. Something you may or may not know is that it is not good to keep the AC adaptor plugged in all the time. This causes the notebook battery not to fully discharge after being charged. Over a long period of time, the battery will not even charge anymore. My suggestion is that if you know someone with a similar AC adaptor to yours, borrow it to see if it charges your battery. If the battery doesn't charge then you know to replace. However, I am almost certain that you problem is the battery. Sometime older laptops like the one I have has a reset button on the underside. If yours has one try removing the battery and leave it out. Then plug in the power and press and hold the reset button for 10 to 20 seconds. If no reset button is on yours then do the same process with the battery removed and power adding, but hold the power button instead.
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The computer was on ac power the last 2 weeks. I checked the ac adapter with a meter and it is puting out voltage.....19 volts as it should. It does have a reset button, I tried that and it didn't work to power it up.
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