Thanx vikram,
Done all the above that you mentioned but to no avail :( No there's no BEEP sound whatsoever. It just hangs on to the Splash Screen forever!!! Changes in BIOS settings are taking effect, like when i change my 1st boot device to HDD or DVD rom or vice versa.
Pressed F12 after pressing the power button and can manually select the boot options...and when i HDD is selected my Windows loads up with no problem. And the system doesnt crash/freeze anywhere, but then again when i restart the computer its back to the splash screen. Moreover i re installed the Operating System but the problem persists!! Every time im trying to boot it gets hung on the Splash Screen (Dell Logo) But works like a charm if manually HDD is selected by pressing F12 when power button is switched on!