what is the life expectancy of a laptop
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.