I was reading at yahoo answers and a guy answered: "By far, the component that is affected the most is the motherboard because it holds so many components that need to work concurrently in order for the laptop to simply turn on. The most common problem is that the motherboard's capacitors go out first leading to a non-bootable(and thus non-usable laptop). These capacitors have up to 5000 hours of life. A rough estimate for someone who uses laptops as their primary computer (e.g. without a desktop) is 5 hours a day average; this yields 2.7 years. (Keep in mind in mind that this calculation assumes that you use your laptop for EVERYDAY for 5 hours, regardless of your vacation or days off. If you actually do use it for 5 hours a day it may be significantly less.) But this is simply a very rough estimate and it can vary drastically depending on how frequently you use it. (Remember, if you turn it off when you don't use it, you will preserve the life of your laptop.) " https://answers.yahoo.com/question/index?qid=20100313013520AAQb2nC I think this is real bullshit about the capacitors that have only 5000 hours of life. My mom has an acer bought in 2008, which is still running strong and she uses it about 5 hours a day.