Laptop doesnot remember the date it goes to 1632

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Yeah it could be. Always use the correct adapter mentioned for your laptop. Otherwise it could harm the inner wirings and the motherboard. Always go for the right adapter. If it was any motherboard problem, atleast it would've blinked. So this might be the problem of your adapter or may be of the power button.

Go on this site and download it...

http://pdftown.com/Compaq-Evo-n600c-Service-Manual.html

wrong battery for it or connectoers on battery dirty could be the charger for the battery is bad and shorted battery out

http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?lang=en&cc=us&prodNameId=316675&prodSeriesId=316673&prodTypeId=321957&taskId=135&swLang=8 that link will bring you to the compaq driver page. then you need to click on your operating system right underneath the language.

A battery would fix this but it is the battery on the motherboard that you need. How old is this computer?

Wouldnt fancy taking one apart myself, replacement ones are not very expensive, look here on battery trader , Compaq Evo N600c laptop battery

You can insert the OS installation CD and hit F11 or F12 to get to the boot menu. The you can wipe out your hard drive and put a fresh copy of windows on it.

I just installed a new and upgrade hard drive. My system keep telling me that "non-system disk error replace and strike any key when ready. What do i need to do?

Brightness:
Hold down "FN + F10 (sun icon) + Down Arrow" all at the same time

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