Try to identify which component has failed, the nature of the fault.For example, if the hard disk when accessing the sector monotonously knocks and CD-ROM drive - rings, and after a number of attempts to read or write error occurs, it is clear that out of order this is the device.To check the hard drive for bad sectors, use a bootable CD with the program "Victoria".
If during software failures occur, and even if the appeal to any drives missing, "blame" the memory modules.Check them out with the help of the program Memtest86 +.Removing modules in turn (previously turn off the machine), determined by means of this program, which of them is the cause of failure.Replace only him.
If there is no image on the screen, first of all, try to temporar
ily replace the video card to another (as in the de-energized system unit).If the cause is in it, the image will appear.
If the computer is turned on, but not the "signs of life", and then do not turn off the power key, even if a long time to hold her, has failed motherboard, and it happened because of a fault blockPower, who started to produce excess voltage on the power line standby.Power unit is sent for repairs, and then buy a motherboard, which is suitable for the old processor - it did not burn.
At random crashes and lockups inspect the motherboard for the presence of swollen capacitors.To replace them, refer to the workshop, since the board is multi-layered, and even with soldering skills, but lack of experience is a multi-layer boards it's easy to mess up.
If it does not, and the built-in speaker produces sounds, find out what they mean by typing into the search engine the following line:
(name of the manufacturer BIOS) beep codes
Because in the absence of the image to find out the BIOS manufacturer for the introthe screen is not possible, refer to the label located on-chip ROM or next to it.
To speed up finding problems with your computer purchase called POST-card.Its name is a kind of pun: postcard - postcard, POST - Power-On Self-Test, card - an expansion card (one of the values).It is set (also when the computer is off) into one of the PCI-slots, and either displays the fault code on the digital display, or its name - on the matrix.In the first case, it is attached to the booklet describing the fault codes.Sometimes, such a device is built into the motherboard.