I have an Acer E 15 laptop, and when I originally had it the internet worked perfectly. One day, the computer crashed and restarted, and when it loaded, instead of the normal wifi symbol, it is an image of a computer screen and chord, with a small red x. Ever since, I have not been able to pick up or connect to any wireless internet. I have troubleshooted this many times, and it claims I have a broken or disconnected ethernet cable. I plugged one in and could access the internet, but when removed, the wireless was still disconnected. I can't get it to work again. Please help.