I'm also using the same model laptop and facing the same issue. I took that to the Dell Authorized Service Center, they told me that, it was a chip-set issue and told me that they changed it and collected money from me. Exactly after 3 weeks laptop started beeping and dell technicians are saying that, again chip-set gone. But they are not ready to service it for fee. Horrible service from dell, Dell is hell. They are asking me, money again to change the chip-set . I don't think its a chip-set issue, because its occasionally turning on and if it is on. it's working pretty good. Can anyone know exactly what would be the issue?