Usually after a hard knock like that the damage will be to hardware, not software like the operating system. The first thing to do, if you are comfortable in doing this, would be to check and see that the hdd and RAM is still properly seated. Other than that about all you can do is to run Memtest86 to check the RAM and the manufacturer's diagnostic tool for your hdd.
***** A. If you have more than one RAM module installed, try starting computer with one RAM stick at a time.
NOTE Keep in mind, the manual check listed above is always superior to the software check, listed below. DO NOT proceed with memtest, if you can go with option A
B. If you have only one RAM stick installed...
1. Download - Pre-Compiled Bootable ISO (.zip)
2. Unzip downloaded memtest86+-....iso.zip file.
3. Inside, you'll find memtest86+-....iso file.
4. Download, and install ImgBurn: http://www.imgburn.com/
5. Insert blank CD into your CD drive.
6. Open ImgBurn, and click on Write image file to disc
7. Click on Browse for a file... icon:
8. Locate memtest86+-....iso file, and click Open button.
9. Click on ImgBurn green arrow to start burning bootable memtest86 CD:
10. Once the CD is created, boot from it, and memtest will automatically start to run.
A side note. You may need to change the boot order in the BIOS so that the DVD/CD-ROM the first device in the boot order to be able to boot from the CD you created.
The running program will look something like this depending on the size and number of ram modules installed:
It's recommended to run 5-6 passes. Each pass contains very same 8 tests.
This will show the progress of the test. It can take a while. Be patient, or leave it running overnight.
The following image is the test results area:
(Unfortunately the image which should have been shown here apparently isn't available from what ever host site was used.)
The most important item here is the “errors” line. If you see ANY errors, even one, most likely, you have bad RAM.
As for the hdd, you can use the service tag on the bottom of the laptop to find out who the manufacturer of the hdd. Once you know this you can go to the manufacturer's website and download their diagnostic tool, you will want the DOS version which will allow you to burn this file to a CD.
Let us know if there are any other question.
Edited by dc3, 17 February 2013 - 05:18 PM.