I have user's 4510s laptop that wont boot. According to him the there was a powercut and they shutdown the machine but when they tried to restart it wouldn't boot. Presssing ESC does nothing and even putting Hiren's CD does not boot from the CD. the scenario is similar to http://www.youtube.com/watch?v=IN9-1ET00Rg. I have tried to remove both the hard drive and RAM and there is no beep or anything.