*NEED HELP* Asus UL20A Battery Issue

OK, so here's the deal. I have had the laptop for about a year to year and a half (enough that I am past my warranty period). The laptop was used for work, so It was charged to full at night and then used all day on the road to anywhere from 25% and lower remaining most of the time each night. One night about 2 weeks ago, I plugged it in like normal, but when I woke up, the amber battery charge LED on the front that normally is solid and then turns green once it is charged, was blinking amber. I booted the laptop and found it had only charged the battery about 10% from 6% through the whole night. I tried reseating the battery, power plug, and adapter as well as plugging it into a different wall plug. I would get "plugged in and charging" from the battery icon in Windows (I run Win 7 Pro 64 bit with the Asus Power software), but it would never go higher on the charge percentage gauge. Additionally, sometimes it would randomly start switching back and forth between the "plugging in charging" and "Unplugged on battery" from the Asus hardware with the quick little animated screen it does continuously and very quickly to where I either had to remove the plug and let it run on battery or reboot the machine.

Next, I removed the battery and used it all day without battery on the A/C adapter alone. Never had an issue, so the A/C Adapter seems to be working fine. I figured it may be the battery giving out considering how much usage I had on it, so I went ahead and ordered a new battery from Asus. The battery came in today, and when I switched them out, the system shows that it sees the new battery and shows 0% charge, that it is plugged in and charging, but it won't charge. I have left it plugged in both on and off for over 3 to 4 hours (laptop normally takes only 2 to 2 and a half when off to charge from being completely dead) but still shows 0%. I tried to go to device manager to uninstall the Battery ACPI driver and then let it reload it, but that didn't fix it either.

I have double checked all pins and connections and nothing seems out of place. I even took the laptop apart to verify that no soldered connectors or anything were damaged on the motherboard.

I am at a loss. Can anyone provide me with some help to what may be causing the problem and what I could possibly do to fix it? TIA.

BK

 

Is it actually charging the battery, despite what the level says? The circuit could just be giving bad numbers, I've seen plenty of laptops that have perfectly fine batteries but have weird symptoms from bad controllers or software corruption. The charging circuit is probably at fault if it won't charge at all, in that case there's not much you can do except send it in for a repair.