What should I do if my computer does not turn on? CPU
If the power supply unit is functional, the motherboard provides a "command" CPU at the beginning of the work. CPU chips perform a self-test and if everything is in order, then the process of computer initialization begins. The procedure for initializing the protection in the BIOS.
If the processor (SRU) is faulty, initialization does not occur. Fans and hard drives work, you can see that the PS / 2 keyboard and mouse are live, but visually nothing happens.
How can I check if the system is working correctly? To do this, you need to undock the fan connectorCPU cooling system. You will see that after a very short time the cooler heatsink will become very hot. If this does not happen, then the processor is not all right.
It should also be check, whether the north and south bridges of the chipset are heated, the chipsRAM modules. These elements should be warm to the touch (you should check carefully). If any particular element does not heat up, then either it is defective or the motherboard.
If the processor is functional, the BIOS checks and initializes the system components (POST). First, the chipset is initialized, then the DMA, the memory controller.
If the processor is faulty, then practicallyis never subject to recovery. The cause of the failure of the processor can serve as a high temperature. If the processor heats up to 100-200 ° C or the rated voltage is exceeded by 1.5-2 times, the processor will break in a few seconds or even fractions of a second.
If the crystal of the processor is open (for atechnology implemented Pentium III, all Athlon and Athlon XP), the processor is especially "afraid" of mechanical damage. When installing the cooler on the processor, you must adhere to the extreme sharpness. The slightest chip is sufficient to disable the processor! Do not drop the system unit to the floor!
