Power up -- on boot will not boot untill forced shut down the boots up ok

I think yiu also need to check your RAMs. Just use the one RAM and try by replacing and cleaning one by one. Thats only option you can check it.

You didn't say Windows what? makes a big difference you gotta know. Have you tried a safe mode start up by tapping F8 a few times key right after Bios screen blanks & before Win. screen appears. Once in the boot menu choose safe mode. Let it boot then try decreasing the video settings & restart. if that"s not the fix restart in SM & uninstall video driver. It should reinstall a working driver on next start up.

Force off by pressing the power button for 10 seconds or more. Boot into safe mode, type msconfig in the run line, disable everything that starts. Restart normally, re-enable each program untill you find the one giving trouble.

Well, you can go to shutdown and then choose reboot in Windows....But to force a reboot, hold down the laptops power button for a few seconds until the system shuts down. After it has gone black for about 20 more seconds press that power button and the system will boot. Good luck!

Hold the power button until the computer shuts down.
Restart and press F8 key repeatedly until you get a start up menu.
Select safe mode from the menu.
After the computer boots up, and you are at the desktop, go to my computer and select properties of the C drive (your system drive). Select tools from the tabs, then defrag. When defrag finishes, select check drive for errors and select the box, to automatically fix errors, and then ok, and yes at next window, allowing the computer to schedule the error check at next boot.
Reboot and allow computer to scan the drive.
After it finishes, you will continue into windows. Allow windows to boot. After it finishes, attempt to shut down again.
If it works, you fixed it. If not, you have a driver or program that will not quit, and you will have to research further to find out what is running and why it won't quit.

Hi - hold the power switch down until the machine is forced to shut down. Then re-boot and continue any further troubleshooting from there.

1. It means the normal shutdown process is not working!

2. Try to press the "Power" button continuously untill the system shuts down!

3. Restart the system.

4. Press F8 key to get the advanced booting options.

5. Select the last option "Last Known Best Configuration"!

if it don't helps tell me...tc! :)

blow out dirts on bord, then you pack the board to avoid any bridging with the cassing

Ok try this, shut the power off after you unplug it. Take out the battery, wait a minute and put it back in. Restart, that should fix it. If it's a larger problem let me know.

You need to, either, turn it off at the power button when it starts to reboot so as to do a hard shut down, or if that doesn't work,  when it is booting up, press F8 continually until you enter safe mode and then select 'last Known Good configuration', press enter for a reboot and it should be ok.