Dell Inspiron laptop has knock sound on startup
Dell laptop makes a knock sound upon startup. Nothing displays on the screen. Lights indicating power on and the sound from the CD compartment can be heard upon startup. Hard drive was removed and appeared in good condition with heads parked and disks shiny and undamaged. Attempted to start the unit without the hard drive, connected and got the same knocking noise which sounds every two to three seconds apart but no display on the screen.
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