i have dell vostro 1510 laptop but when i turn it on with a power adaptor plugged and sometimes even when on battery it goes off with a clicking sound and i have to remove the battery before it can work again and it some times works with the battery but hangs midway i have never used it fully since then cos it hardly turns on with the above problem (it tries to boot then it goes off,i tried changing the hard disk and ram but this made no differene)