Hi! A friend asked me to look at her Acer Aspire 3641WXMi laptop. You plug it in, and a dim power light comes on, and the battery light next to it comes on brighter. Both lights are amber in color. Nothing else happens. I took the battery out, and plugged in the adaptor, and no lights come on. Is it a power supply? How would I check for this? If it is the power supply, how would I replace It? Would it be worth it to replace it? Or, what else could it be? Any and all responses will be greatly appreciated. Thanks.