Originally Posted by thefultonhow
I'm pretty sure that even with running our lappies 24/7, they will still work when we get rid of them. I know I don't plan on keeping mine any longer than three years, and others sell theirs even sooner. Also, moving laptops around puts far more stress on them than leaving them on in one place does, and they're designed to be moved around, so what gives?
All electronics have an MTBF, that is a rating for maximum time before failure, this MTBF varies for all of the components of the laptop like the fans, hard drive, graphics etc. The more its on and running, the sooner you burn up the MTBF and more likely to run into problems like fan failure. Its just not common sense to leave something running when you are not using it, especially when you are sleeping.
I have repaired several desktops for people who were told they should leave them running all of the time, then after an eight hour day at work came home to a burnt electrical smell coming from their computer because the fans failed while they were out and their systems overheated usually causing some form of damage to the hardware components.
If thats the kind of risk you like to take and dont mind wasting electricity for no good reason then by all means go for it.
Fans usually have the lowest MTBF of all the compnents in your system, perhaps you could leave yours running all the time and get back with us on your findings.