Why won't my Acer start up?

My acer aspire 4750z wont start . the power button is on but nothing shown on the monitor. can someone help me?

• recently i install ac dc driver by pheonix. my acer suddenly shut down and wont starts. i think the bios is the problem and im not sure. i need someone helps me here.....

• Answer:

  If the above steps do not reset the CMOS settings we suggest removing the CMOS battery for 5 minutes causing the computer to forget all settings. Removing the CMOS battery like the one shown in the picture to the right will cause the system to loose all CMOS settings including the password. To do this locate and remove the CMOS battery on the motherboard for at least five-minutes. After this has been done put the battery back into the computer and turn it back on. If your computer does not have a CMOS battery or you're unable to find it you'll need to do a hard reset on the CMOS using a jumper or dipswitch on the motherboard. Information on finding these can be found through your computer or motherboard documentation.