My TX 2120 has had several issues as of late, and will no longer turn on. Before this happened, the mousepad stopped working and the keyboard would only work before it went to sleep after it was turned on. Now, when I try to turn it on, all the lights and fans turn on briefly, and then shut off, but sometimes while turning on, everything seems as if it is working fine, but the screen doesn't change and nothing responds. Help would very much be appreciated.