Table of Contents
How to learn to repair computers
How should I learn to repair a computer? We have collected some of the methods on learning to repair computers, I hope it will help you.
1、Learn to repair the computer, repair judgment must start from the simplest things, on the one hand, to observe, it includes:
(1) The environment around the computer: location, power supply, connection, other equipment, temperature and humidity, etc.
(2) The phenomenon of computer performance, the content of the display, and their differences and similarities with the normal situation.
(3) The environmental conditions inside the computer: dust, connections, color of the devices, shape of the parts, status of the indicators, etc.
(4) The hardware and software configuration of the computer: what kind of hardware is installed, the use of resources, what kind of operating system is used, what kind of application software is installed; the set driver version of the hardware, etc.
2、Analysis and judgment
Start with the simple things that are good for concentration and for fault judgment and positioning. Be sure to pay attention to the judgment and repair must be made only after careful observation.
According to the observed phenomenon, to “think first and then do”,
Think first and then do, including the following aspects.
First, first think about how to do, where to start, and then the actual hands. It can also be said that the first analysis and judgment, and then repair.
Second, for the observed phenomenon, as far as possible, first consult the relevant information to see if there are corresponding technical requirements, use characteristics, etc., and then according to the information consulted, combined with the following to talk about the content, and then proceed to repair.
Finally, in the process of analysis and judgment, according to their existing knowledge, experience to judge, for their own understanding or simply do not understand, must first to experienced colleagues or your technical support engineers to consult, seek help.
3、In most of the computer maintenance judgment process, always judge whether the software failure first, first check the software problem, when the software can be judged.
Check the software problem, when the software environment can be judged to be normal, if the fault can not disappear, and then start checking from the hardware side.
4、In the maintenance process to distinguish between the main and secondary.
In the recurrence of the failure phenomenon, sometimes you may see a faulty machine has more than one failure phenomenon, but there are two or more than two failure phenomena (such as: no display during the start-up, but the machine is also starting, while after the start-up, the phenomenon of a dead machine, etc)
At this point, you should first determine, repair the main fault phenomenon, when repaired, and then repair the secondary fault phenomenon, and sometimes may not need to repair the secondary fault phenomenon.
Computer repair skills
Example 1: The motherboard does not start, no display on the computer, there is a memory alarm sound
Cause of failure: Memory alarm failure is more common, mainly caused by poor memory contact. For example, the memory stick is not standardized, the memory stick is a little thin, when the memory is inserted into the memory slot, leaving a certain gap;
Poor gold finger process of the memory stick, gold finger surface gold plating is poor, over time, the gold finger surface oxide layer gradually thickened, resulting in poor memory contact; memory slot quality is poor, the reed and memory stick gold finger contact is not really, etc..
Treatment: Open the chassis, carefully wipe the gold fingers of the memory stick with rubber, take down the memory stick and reinsert it, fill in the gaps on both sides of the memory slot with hot melt adhesive to prevent continued oxidation during use. Note: Be sure to unplug the host power cord when unplugging the memory stick to prevent accidental burnout of the memory.
Example 2: The motherboard does not start, boot no display, there is a video card alarm sound.
Cause of failure: Generally loose graphics card or graphics card damage.
Treatment: open the chassis, the graphics card can be reinserted. To check whether there are small foreign objects in the AGP slot, otherwise the card can not be plugged into place; for the use of voice alarm motherboard, you should carefully identify the content of the voice prompts, and then according to the content of the corresponding failure.
If the above approach to deal with the alarm, it may be the graphics card chip is bad, replace or repair the graphics card. If the self-test after the boot, the display is normal but there is no image, the graphics card plugged into other motherboards, the use of normal, that is the graphics card and the motherboard is not compatible, should replace the graphics card.
Example 3: The motherboard temperature control malfunction, resulting in the boot without display
In the course of a game, the machine suddenly blue screen, reboot, wait until the optical drive, hard drive after the self-test monitor does not light up.
Cause of failure: the temperature control line connected to the motherboard off, fell on the motherboard, resulting in the motherboard automatically enter the protection state, refusing to power up. As the CPU heat is now very large, so many motherboards are provided with strict temperature monitoring and protection devices. Generally the CPU temperature is too high, or the motherboard temperature monitoring system failure, the motherboard will automatically enter the protection state. Refusing to power up the boot, or alarm prompts.
Treatment: reconnect the temperature monitoring cable, and then power on the computer. Note that when your motherboard does not boot properly or alarm, you should first check whether the temperature monitoring device on the motherboard is normal.
Knowledge of smartphone repair
1, Before repairing, you must carefully check and understand those phones that are malfunctioning, which is a prerequisite for efficient repair.
2, In the internal circuit board of the phone, as are embedded with different manufacturers and different models of integrated chips, in addition to the printed circuit board there are some new components, all these chips and components are transmitting some weak current signals, so do not repair operations in a strong magnetic field under high voltage, in order to avoid the impact of high current, damage to components.
3, In the repair of cell phones, we should follow the rules of operation of maintenance, first to properly connect the test instrument, and then open the test instrument and set it correctly, the initial judgment of the phone belongs to which type of fault, and the possible scope of failure.
4, Because the cell phone is a microelectronic products belonging to an integrated circuit, its internal integrated circuit structure is very precise, and is developed and developed through advanced technology, so this requires us to repair the cell phone before the maintenance staff, must understand the performance of each chip and components of the cell phone circuit board.
In addition must also be clear about the logic link between each chip in the cell phone circuit printed board, circuit analysis, careful inspection, correct judgment, fast and accurate operation, to avoid miscalculation, resulting in human failure, resulting in economic losses.
5, In the disassembly or installation of cell phone operations, in accordance with a certain order before and after the operation, take and put the chip, components should also be in a certain order, so as not to lose the chip or components.
6, Because the cell phone transmission is some weak signal, and our users or operating tools attached to the electrostatic enough to burn some components, in order to reduce losses in this regard, we must repair the phone in the anti-static bench, in addition to ensure that the test instrument, maintenance personnel and electrical shielding between the bench to do a good grounding.
7, Different manufacturers, different models, different styles, its version number is different, so in the repair of some cell phones need to replace components, to use the normal version of the same qualified chips, components, to avoid replacing different versions of the chip.
8, Due to the phone in the spare parts are relatively small, in order to prevent the process of disassembly, spare parts are lost or less installed, we must ensure that the workbench to clean, sanitary, maintenance tools are complete, and placed at hand.
In addition, we must pay attention to is to keep the cell phone printed circuit board clean and clean, so that it can not affect the repair operation, in the process of repair, but also to prevent all the solder, tin beads, wire material, conductivity into the circuit board to avoid causing other aspects of the failure.
9, In order to ensure that after the repair of the cell phone communication quality is not reduced, we had better not to use those technical indicators in the repair process of the pirated smuggled chips and components that are not qualified, so as not to cause more complex failure.
I want to tell you that all the above knowledge I learned through the smartphone and laptop repair course, these are only a very small part of the course, this set of courses taught by people with expertise in repairing computers and smartphones, each section covers the main faults that can occur in smartphones, showing you how to identify the problem and how to repair or replace the faulty parts, is to repair all brands.
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