Hi,

As lepricaun suggests, check that your memory is firmly seated, also your other components such as the video card.

One of the heaviest components in a laptop is the rechargeable battery. I suggest you check that it is firmly seated, and charging up. Your system should bypass it when it is plugged into the mains, but if the contacts are not being made properly, this may not work. Dropping it may have caused the battery to have become partially disloged or even damaged the contacts.

You might try the "reset button" if it has one.......................usually a little cocktail stick sized hole somewhere on the case.

Unfortunately, the most common cause of problems in these situations are cracked/fractured "dry joints"...........that is, soldered connections. This invariably means a trip to the repair shop, as they are not easy to detect, and you may need specialist equipment to fix them ( a de-soldering gun, for example).

Good luck