Lecture
Many users, if necessary, pull out the cord of the keyboard, mouse, printer, and other devices while the computer is running. This is extremely detrimental to the ports of the motherboard, which at the same time experience a power surge. It is impossible to control this voltage, so the ports burn out.
port faults
I / O Port Failure
Let's start with the simplest mechanical breakdowns. One of the most frequent malfunctions of this kind is the output and the construction of port pins (LPT, COM, PS / 2, etc.). Most often, it consists in the fact that, for example, the contact in the keyboard or mouse connector periodically leaves. This problem occurs on computers to which devices are often connected and disconnected. These connectors are not eternal, have a very limited resource for connecting / disconnecting cables and, when used intensively, fall apart or are designed so that the plug simply does not hold in them. The same goes for PCI and AGP slots: if they are not handled, they can be damaged, after which they will not provide normal contact with the device.
Repair I / O Ports
Practice has shown that the I / O ports on the motherboard often fail, especially if the devices connect to the ports on the go. The most common problems are LPT, COM and PS / 2 ports.
Ports are subject not only to combustion, but also to mechanical damage. Most often this happens with the PS / 2 ports of the keyboard and mouse. Due to the frequent use of these ports, the internal pins of the connectors are loose. As a result, the contact between the port and device connectors is broken, which does not bode well.
To troubleshoot, replace the faulty connector with a working one. As a rule, the working connector is evaporated from the inoperative motherboard, where it will never be useful.
Soldering and soldering the connector is not the most difficult, but rather time-consuming and dangerous operation. To pull out the connector, you need to warm up the entire contact pad. This is fraught with overheating of printed conductors, which may lag behind the board.
After the connector is removed from the board, it is necessary to bring it back to normal. First you need to align the legs of the connector if they are bent during the desoldering process. The next step is to remove the solder from them. To do this, use a soldering iron or flat file. The legs should be smooth and uniform in thickness. This ensures easier soldering of the connector to the workplace.
In addition, a seat should be prepared. The alcohol you have prepared is useful for this. Gently wipe the desired section of the board, and then try to free the holes in the seat socket that are flooded with solder during the process of desoldering the connector. To do this, use a needle of a suitable size, inserting it into the holes preheated with a soldering iron.
Installing a new connector is easy enough. After inserting it into place, apply a little solder liquid and warm the solder near each leg so as to ensure maximum contact. In this case, do not forget about possible overheating.
Broken conductors are a fairly common situation, especially if a novice user is engaged in assembling or upgrading a computer. In an effort to make things faster, he forgets about elementary rules. Such impatience can be understood, but the result of this impatience is no less understandable.
Most often, the conductors are damaged by a screwdriver, although other options are not excluded.
This situation can be corrected if external tracks are damaged on the board. With an internal break in the conductors, the motherboard can be left for spare parts, since it will never work again.
Fixing an external break is simple. Prepare a thin copper wire and scalpel. Strip the wire itself and both ends of the tattered conductor with a scalpel. Then apply soldering liquid or rosin, attach the prepared wires to the conductor with tweezers and solder it on both sides with quick spot heating.
After this, it is necessary to wipe the recreated area with alcohol and remove the solder residues with a scalpel, which can short-circuit to adjacent conductors.
продолжение следует...
Часть 1 Faulty ports on the motherboard (COM LPT USB)
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Diagnostics, maintenance and repair of electronic and radio equipment
Terms: Diagnostics, maintenance and repair of electronic and radio equipment