Not necessarily. This means the operating system is either damaged or missing. If you are not receiving any messages about a failing drive you may be able to simple reinstall Windows from a Windows CD. Online Virus Removal 39 99 Online Virus Removal and Online PC Help
Friend I am presuming you want to know HOW to change the Bios / Cmos battery on amilo xa 2528.
This video shows you how http://www.youtube.com/watch?v=s8kKHChQ2sw
The graphics chip probably needs re-balling which is a nightmare. This type of thing occurred on a number of older laptops due to the wrong cooling system being installed.
The only way I know to get it working again is to expose the vga chip use heat reflective tape around it to protect wires and other circuitry and then use a heat gun to melt the balls of solder underneath the chip and re-establish their contacts.
Heres a video:
https://www.youtube.com/watch?v=mvn0esIXVZw
I did it once on a Dell XPS laptop and it worked for 6 months before failing again
If by power input you mean where you plug in the AC adpater. No, you will have to completely separate the top and bottom of the case. This means usually unplugging the cables for touch pad keyboard, be careful. Often they are on a dongle. but some are soldered to the main-board and difficult to replace.
