I have this Lenovo 3000 N100 which I bought in May 2007. From the specification it says that the battery life will last up to 3 hours but it’s not. My battery gets empty after 2 hours or less. Surfing the net informs me that this problem might due to overcharging. I spend lots of time in front of my machine and while I am connected to AC power (and so the battery is charging) I missed to notice that it’s already full. That made me thinking that it might really be the cause of the overcharging. Since then, I removed my battery and connect to AC directly. I barely carried my notebook with me anyways.

The first problem occurred after a couple of months when I tried to reattach the battery. The battery is not charging. The one year warranty is over and so calling the service center won’t help at all. That made me connects to AC directly whenever I used my notebook.

Two months ago the disaster with my Lenovo 3000 N100 turned up. My notebook suddenly shuts off with no reason at all. Sometimes it's running up to 1 hours maximum. But it shuts off even a few minutes after starts up. The fan is running. The machine is still cold (just started up). I booted-up and only opened the CMOS but it still shuts down. I brought my machine to Lenovo Service Center and the engineer told me that the board is corroded. How in the hell my board get corrosion when no liquid has been spilled there since I bought the laptop?!

I can’t do anything. I searched the net and found out that there are so many similar problems with Lenovo 3000 N100 as mine. Money has been wasted. 

http://www.google.com/search?hl=en&q=lenovo+n100+suddenly+shuts+off

http://www.consumercomplaints.in/complaints/lenovo-3000-n100-c42859.html

http://www.consumercomplaints.in/bycompany/lenovo-3000-n100-a23239.html

 http://www.experts-exchange.com/Hardware/Laptops_Notebooks/PC_Laptops/Q_23082546.html