About 2 hours ago, my mum logged out the computer as per usual, and I logged in my account.
Then suddenly the computer didn't response and just freeze there, so I pressed the Reset button the reboot it.
The problem then came - the booting procedure now becomes like this:
1. the fans start running
2. the USB devices and optical drives have their lights on and then off
3. no BIOS, no POST, no image on the screen
4. the hard disk indicator went off. the computer is still *physically* running, but there is no output image.
I tried the following methods trying to solve the problem:
1. check the wires
2. check the display card
3. check the VGA cable
4. remove the CMOS battery