Laptop dim; backlight/invertor to blame, or MOBO?
So I've got this laptop that I bought back in 2007. Sometime last year the backlight started getting very dim. Whenever I hooked the laptop up to an external monitor it output just fine.
Oh, also, its an Acer Aspire 5100-5023. I've looked one Google and various places have told me it's the backlight going out, and another said it was something to do with the motherboard.
Is there an easy way to tell?