Power led is not lit and power supply fan does not work
if the lamp power led is not lit and power supply cooling fan is not on the first suspicion would be addressed at the power source itself. sometimes, an electric voltage is too low which also makes the pc silent when given the power to him.
if the computer has a problem like that, how to deal with is: make sure that the available supply of electricity from the grid. use a multimeter or test pen to test the availability of electricity supply in the plug. whereas, a too low voltage can only be overcome by installing ups or stabilizer. when the normal power, check all the lines connecting the cable to the pc power supply to the electric nets. to be safe, if your pc is at home, turn on the computer at the time of day when the voltage electricity network had been at the peak load. electrical peak load causes the voltage down, and this usually occurs during the afternoon or evening. to check the power supply through a practical way, you can menghubungpendekkan cable channels on power supply cable through the hole using the tip of the short wire. or you can use a multimeter.

power led is not lit, power supply fan spinning, but the system does not live.
if the power light is not lit, power supply cooling fan spinning, while the system would not start, then there are two possible causes. The first power supply voltage from your house too low, or possibly both, damage to the power supply output on your cpu.
if the problem occurs on a computer, then make sure first that the supply voltage enough. voltage is too small will make the power supply can not function normally. use a voltmeter to measure the output voltage from the power supply. typically, the output voltage from the power supply 5 volts berukutan. when the voltage signal is not detected or too weak, there is the possibility of damage to the power supply. replace power supply on your cpu.

power led is lit, but no system is detected.
if the power light lit, whereas no activity is detected the system will most likely provided the output voltage power supply to the motherboard and other components too low. dc voltage signal must be detected on each cable that is connected to components such as motherboards, hard drives, floppy, and other devices. Another possibility, there is a short circuit on one or several components.
if the problem occurs on a computer, what to do first is to check the output voltage. if this wrong, do an examination of the fan and processor heatsing on soketnya. make sure that the fan had heatsing one tercolok into electrical power from the motherboard. make sure also that the processor is seated correctly and locked tight. after that you need to check all the cards are installed and all components connected to the power supply. when there are cards that are not embedded with a perfect, this kind of position can make a short circuit and makes the system does not work. make sure also that the motherboard there is no interference that makes the circuits affected. sekru, cable, or other dirt attached to the motherboard can cause a short circuit. screw-locking screw that connects the motherboard to the chassis can also cause a short circuit so that the computer will not work fainted. use protective plastic or other materials that are insulators to prevent this short circuit. if still does not work, try to assemble the components outside the casing and run the system outside the casing.

power led is lit, but there was two times or more the sound of "beep".
if the power light lit, but the sound of two or more sound "beep" then the problem is the lack of video signal in your pc.
if the problem happens the solution is to please check your video card. This single issue could cause the computer to hang and stop the process of loading the operating system. make sure that your video card and embedded correctly. beep sound is the signal sent by the pc when passing the post (power on self test). sound characteristics of this process differ between pc systems with one another, depending on the type of bios is used.

power led is lit, but it appears sound "beep" continuously.
if the power light on, but heard the "beep" continuously, the problem is happening is no system in the pc memory.
if the problem happens, the action must be taken is to check whether your memory is working well and properly embedded. no other reason except the memory components derived from this. however, recently there are some motherboards that do not raise this beep sound, so we have to examine it more closely through the display on the screen. check the appearance of the display memory of reading on screen right after we turn on the pc.

power led is lit, the idea was not detected components.
if the power light lit, but the idea is not detected components after post then the problem is the possibility of a cable or electrical supplies such as hard disk peripheral ideas and cd / dvd drive problems. other possible problems, peripheral itself is problematic.
if the problem happens the solution is to check the power supply and cable connected to the periphery. previously used to make sure the pc bios settings are set. when trouble set bios settings, bios settings to make this pengturan be auto detect and enter the settings on the default position. check whether the cable is connected to the peripheral have been installed correctly. if still not detected, the problem probably lies in the hard disk or cd / dvd drive installed.

normal power system, but did not show anything on the screen.
if the power system to work normally and post work out, but did not show any display on the screen, the problem is there are two possibilities, if the monitor itself or the video card on the cpu.
and solutions to these problems is to please check your monitor. if it still works well, your attention to the video card. possibility, if this process occurs, your video card is damaged or disturbed at all. replace your video card.

problem when the system was about to go into windows
if the system power on, post work, but problematic when the system was about to go into windows, then the problem probably lies in the operating system itself, either crashes or settings change. Another possibility, the problem derives from the application software is already installed on the hard drive.
and the solution if your computer is having problems re-check whether the operating system is installed properly or not and if there's no solution, do re-formatting your hard disk, operating system reinstallation.

windows always entered the safe mode settings.
if the system works normally, but windows always entered the safe mode setting, then the problem happens is a driver conflict, irq, or other resource on the pc. other potential problems, there are software applications that collide each other.
solutions to these problems is to remove all the cards, additional lighting is not used unless pc system, remove all unnecessary drivers, and after cleaning removed all drivers, restart your pc. suspected software applications when all I had you take but the problem still appears.