is clear that according to the problem This computer, will follow a series of steps, but as it is impossible to list all the problems that may arise, it is better to establish general rules to follow but not too strictly.
The order of assembly described in previous chapters, gives an idea about how to discard devices, but the issue may be more complex. Below are sets of problems and their possible approach to the diagnosis.
- There is no indication of operation (LED off, supply fan stopped): obviously no power. The source can be damaged or prevented from delivering a short circuit current. Remove all power connectors and check if there is tension. A source is more expensive to repair than to replace, except that the fault is in the fuse incorporated into, which is difficult since these sources are protected against overload, so that before melting the fuse is automatically disconnected .
- No video image: this problem is going to be tested. If the LEDs light up but do not see image, check if the computer does start watching the activity LED on the drive and the noise they make this and the drive to be tested. If boot, the problem is on the video card (or monitor). If no start two things can happen: (1) The video card has some problem, and the motherboard can not boot. (2) The micro-plate-set memory is faulty. The latter case may cause the speaker emits beeps that indicate the presence of trouble. First desconente hard drives and other devices that are not essential for image and discard the interference of a breakdown of these (please for the First Test). If that does not, check by replacing the memory, the processor and motherboard in that order.
- There is a picture but does not load the operating system: At what point do the boot? Depending on this could be the problem in focus group micro-plate-reading memory or on disk boot. If you manage to boot with a floppy disk is unreadable or has lost the operating system. In the first case, there may be hard disk failure, controller failure or loss of hard disk parameters in the SETUP. If you do not get to read the hard drive, the micro-plate-set memory may be the cause. Note also that a damaged controller, you can lock the system at this point. Proceed to check by substitution as appropriate. At this point may appear BIOS messages indicating the problem. A common one is the loss of the configuration of SETUP impairment battery or battery plate, which can cause even that has not even boot from the floppy drive to be lost as well the parameter that indicates the type of this.
- The computer freezes or resets randomly, discarding any software problem, it is the most common cause. There may be conflicts between interruptions, wrong plate configuration, fault or micro motherboard.
- strange characters appear on screen: probably the video card is damaged.
- Other symptoms: Apart from the above, there is a myriad of symptoms, which investiación requires careful monitoring and replacement stepper devices suspected triggers. The micro and motherboard often cause a variety of problems and strange, sometimes intermittent, and difficult to locate. Do not waste time and replace components, end earlier.
Broadly, these are the symptoms of an indefinite failure. If unable to locate the device fails, the following paragraphs will help solve the most common.
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