The reason, why Computer can not Boot?

. The reason, why Computer can not Boot?  

Computers are dead / hangs before entering operating system can cause can vary. Here are tips that I've practiced and almost always successful. Select in accordance with the problems faced by, or done in stages.

1. Check cable, starting from the incoming cable to the UPS / Stabilizer, Power cable to the monitor, monitor cable to the CPU and the cable into the computer. Make sure the installation was appropriate and tight, and there is electrical current and sufficient.  
2. If there is a CD-ROM / DVD-ROM and can be opened / closed, then the possibility of problems on the computer (CPU), starting from the power cable into the motherboard or the motherboard itself, check the cable installation. 
3. If the two steps above are checked, and still not lit, turn off the computer and reset the BIOS on the motherboard. The way can be seen in the motherboard manual, and find the BIOS Reset menu. Usually to reset the BIOS can be performed on Jumper 1 (JP1). There is 3 pin, which 2 of them associated with a small connector. To reset, just remove and put in the other 2 pins. For example the 3 pin pin 1,2,3 and 1 and 2 are connected, then stay off for the reset and put the pin 2 and 3. Allow about 30 seconds or so and then return as before. Turn on the computer.

          CMOS battery and Reset Switch 

            4.     if the BIOS has been reset and still does not work, try out the   CMOS battery, which is on the motherboard. Let stand about 1 minute, then put back and turn on the computer. If the battery is long enough, more than 3 years, it is better replaced with a new one. Especially if the clock on the computer often does not match.

5.       If the fan Processor / VGA spin, but the computer still running, then chances are there's something wrong with the motherboard BIOS or the motherboard is damaged. Maybe the BIOS needs to update, but before the update, the computer must be running (in BIOS) first. To do that, let loose cable Hardisk, CD-ROM, Floppy. Then, off the computer memory (RAM) and replace the other slot or use another computer's memory. This may be repeated several times, until there are signs of life ...

6. If the CPU is looking to work, the hard disk spinning and the CPU led lights flashing but no display screen, then kumungkinan VGA (Graphic Card) computer problem. Try to replace it with another VGA VGA or check it on another computer (This is if the VGA is not so one with the motherboard).

If with all the steps above, the computer is not running, the computer may need the services of people who are more expert. To find out more details motherboard problem or want to become engineers, should buy a special tool called PC Analyzer, which was designed to determine damage to the motherboard. Please share your experience about computer suddenly died and would not start .. may be useful.

Information

CPU is above the motherboard, memory, CPU, Power Supply, Notebook, Floppy and other components in the computer casing, in addition to the monitor. Although the actual CPU is Central Processing Unit (processor), for example pentium4, AMD etc.. This is to facilitate the course.