I have a Dell vostro 1440 laptop , whenever I press power button on it's screen remain blank and it start making 3 beep sounds. Please help
Unplug the system, remove the battery (or disconnect it if it's internal) and hold the power button for 30 sec. Remove and reinstall the memory modules and hard drive.
Try powering up -- if you get the same three beeps, it's a bad mainboard.