I have a laptop compaq evo n160 the problem is . idont know whether if it in tke keyboard buffer or driver or the key board it self the problem description is : " for example when i press "a" it appear "f" when i press "f" it appear "1" and the shift key does not working .. thank you

SOURCE: Compaq evo n160

This problem look LCD cable problem. You might need to check the LCD cable conecctions to the Motherboard and to the LCD if it is lose or broken.

You can connect an external monitor. If it displays, the video card is fine.

SOURCE: How to reset BIOS password for Compaq EVO N160 notebook

Do the following steps -
- Remove the laptop battery - Remove the CMOS battery - Leave it for idle for around 15 minutes - Put the CMOS battery in - Boot the laptop  with AC power - Then put the laptop battery in.
 - The BIOS pwd would have been reset now
- For troubleshotting the battery - Go into BIOS and run the Battery Caliberation tool
Hope this helps. Thanks, AK

SOURCE: My Compaq Evo N160 laptop computer always goes

It is likely that your computer does not meet the required specifications for the software. To fix this problem, you would need to upgrade the RAM, video card, and possibly the processor. This is something that will probably be need to be done by an expert unless you have experience in taking apart laptops and soldering parts onto circuit boards. Good luck!

SOURCE: compaq evo n160 need graphic driver

Click on the link below and scroll down. All drivers for this laptop with Windows XP Pro will be listed.

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=97140&prodTypeId=321957&prodSeriesId=96311&swLang=8&taskId=135&swEnvOID=1093