I have had my x51 for about 3-4 months now and after i restarted my computer it turned back on doing 5 beep intervals and wont boot up.. I have tried everything fixing it, I'm really concerned since i have seen this as a common problem with this system.
I have tried this soolution but id not work: http://en.community.dell.com/support-forums/desktop/f/3514/p/19477069/20241901.aspx
Any help appreciated. Thanks.