Computer failures and troubleshooting methods?

The occurrence of computer failure is a headache, but finding the corresponding solution in time is an arduous task. PHP editor Zimo has specially compiled common computer troubleshooting solutions, covering all aspects from hardware to software. This article will introduce you to the common causes of these failures and the corresponding solving techniques one by one. Come and read this article to keep your computer away from troubles and enjoy a smooth usage experience!

1. Computer failure and troubleshooting methods?

1. Memory failure. When you turn on the computer, it automatically restarts from time to time, or the computer makes a beeping sound, or the system is not running properly and reports an error. The general consideration is that there is a problem with the memory. The solution is: Shut down the computer first, cut off the power supply, then open the back cover of the case, take out the memory, clean it, and then insert it back into the original slot. Generally, it will be good to turn it on again.

2. Graphics card failure. When the computer is in use, the sound is normal, but the monitor suddenly stops displaying, and sometimes the screen is even blurry. This is a problem with the graphics card. The solution is: wipe the golden finger area with an eraser, use a brush or other tools to remove the dust on the graphics card, and it can usually be solved.

3. CPU failure: When the computer is in use, it suddenly cannot be turned on and the monitor does not display. If the problem of the graphics card is ruled out, then it may be a CPU failure. The solution is: use a toothbrush or other tools to clean the CPU pins, and it can usually be solved.

4. Hard drive failure. It is normal to enter the operating system, but it is very slow to open the drive letter, or it cannot be opened at all, or the scan of the disk fails. In this case, it is usually a hard drive failure. The solution is: clean the hard disk, re-plug and unplug the various connections of the hard disk, and reinstall it. Generally, it can return to normal. 5. Sound card failure. After installing certain software on the computer, there is suddenly no sound. This situation is also very common. It is common, usually the software conflicts with the sound card driver. The solution is: if the computer has set a system restore point, then restore the system and get it done with one click. If not, delete the software. If it still doesn't work, delete the software. , reinstall the sound card driver.

6. Mouse and keyboard failure. The mouse does not move and the keyboard does not respond. Usually the connection cable of the mouse and keyboard is not in good contact. Just re-plug and unplug and it will be OK. Some cases still do not move after re-plugging, then restart again. The computer is OK.

7. Monitor failure: The monitor does not display, and restarting does not work. At this time, it is considered a monitor failure. First check whether the monitor power supply is good, and then check whether the signal cable is connected correctly. Generally, it can be solved by reconnecting it.

2. Methods and procedures for troubleshooting, repair and troubleshooting of optical cables?

1. Determine the obstructed optical cable through network management alarms and network topology (check whether the obstructed optical path can be adjusted through fiber jumpers)

2. Enter the computer room to test the length of the obstructed optical cable and compare it with the original test data to determine the breakpoint distance. If necessary, test in both directions 3 , Compare the drawings or measure the length of the ground to find the location of the optical cable interruption (look at the meter length of the optical cable in the computer room)

4. After finding the breakpoint, use otdr to test in both directions.

5. Optical cable connection 6. Determine the alarm with the network management, remove obstacles, and follow the principle of first getting through and then repairing. First the trunk line and then the branch line

3. Network troubleshooting examples and solutions?

Network troubleshooting is a very important part of network maintenance. The following is a network troubleshooting example and solution:

Example: The company's intranet has a problem of being unable to access the external network.

Solution:

1. Check the network connection: First check whether the computer is connected to the Internet. If not, you need to check whether the network lines, switches, routers and other equipment are working properly.

2. Check the gateway settings: Check whether the computer's gateway settings are correct. Normally, the gateway address should be the IP address of the router.

3. Check the DNS settings: If the gateway settings are correct but you still cannot access the Internet, you need to check whether the DNS can resolve the domain name normally. You can try to manually modify the DNS server address, such as changing the DNS server to a public DNS server.

4. Check the firewall settings: If the firewall settings are too strict, it may block communication between the computer and the network. You can try turning off the firewall or adjusting the firewall rules appropriately.

5. Check the network address allocation: If the IP address is allocated through DHCP, you can try to restart the router or manually assign an IP address to the computer.

6. Contact the network service provider: If none of the above methods work, there may be a problem with the network service provider and you need to contact the network service provider for troubleshooting.

4. Sludge pump failure and how to solve it?

Five troubleshooting methods for water pumps: First, check the power supply: whether the connector connection is secure; whether the switch contact is tight; whether the fuse is blown; whether the three-phase power supply is equal. If there is an open circuit, poor contact, blown fuse, or phase loss, the cause should be identified and repaired in time. Secondly, check whether it is a mechanical failure of the water pump itself. Common reasons include: the packing is too tight or the impeller and the pump body are blocked by debris; the pump shaft, bearings, and leakage reduction ring are rusted; the pump shaft is severely bent, etc. Troubleshooting methods: loosen the packing and clear the water diversion channel; disassemble the pump body to remove debris and rust; remove the pump shaft and correct it or replace it with a new pump shaft.

2. The reason is that the water cannot be sucked

The reason is that there is air in the pump body or air accumulation in the water inlet pipe, or the bottom valve is not closed tightly and the water diversion is not full, the vacuum pump packing is seriously leaking, and the gate valve or flapper door is not closed tightly. Troubleshooting method: Press the water up first, then fill the pump body with water, and then turn it on. At the same time, check whether the check valve is tight and whether there is air leakage in the pipelines and joints. If air leakage is found, apply lubricating oil or mixed paint to the joints after disassembly and tighten the screws. Check the oil seal ring of the water pump shaft. If it is severely worn, replace it with a new one. The pipes are leaking water or air. Maybe the nut was not tightened tightly during installation. If the leakage is not serious, you can apply cement or cement slurry mixed with asphalt oil on the air or water leakage area. Temporary repairs can be done with wet mud or soft soap. If there is water leakage at the joint, you can use a wrench to tighten the nut. If the water leakage is serious, you must reassemble and replace the cracked pipe; reduce the lift and press the nozzle of the water pump 0.5m underwater.

3. The supporting power motor overheats

There are four reasons. The first is the power source: the voltage is too high or too low. Under a specific load, if the voltage variation range should be beyond +10% to -5% of the rated value, it will cause the motor to overheat; the three-phase voltage of the power supply is asymmetrical, and the three-phase voltage of the power supply is asymmetrical. If the phase-to-phase voltage imbalance exceeds 5%, it will cause the winding to overheat; in phase-deficient operation, experience shows that more than 85% of agricultural motors are burned due to phase-deficient operation, and a phase-deficient protection device should be installed on the motor. The second reason is the water pump: the power is not matched, the small horse pulls the cart, the motor is overloaded for a long time, causing the motor temperature to be too high; the motor is started too frequently, and the motor is rated for short-time or intermittent work. The number of starts should be limited, thermal protection should be selected correctly, and used according to the rated rating calibrated on the motor. The third reason is the motor itself: the connection method is wrong, and the △ shape is mistakenly connected into a Y shape, which causes the temperature of the motor to rise rapidly; the stator winding has phase-to-phase short circuit, inter-turn short circuit or partial grounding, which causes local overheating of the motor in mild cases and insulation in severe cases. Burned out; the squirrel cage rotor is broken or defective, the motor runs for 1 to 2 hours, and the iron core temperature rises rapidly; the ventilation system fails, check whether the fan is damaged, whether the rotation direction is correct, and whether the ventilation holes are blocked; the bearings are worn, the rotor Eccentric sweeping causes the stator and rotor cores to rub against each other, emitting a metallic impact sound, causing the core temperature to rise rapidly. In severe cases, the motor smokes, or even the coils are burned. The fourth reason is the working environment: the motor windings are damp or dust, oil, etc. are attached to the windings, resulting in reduced insulation. The insulation resistance of the motor should be measured and cleaned and dried; the ambient temperature is too high. When the ambient temperature exceeds 35°C, the inlet air temperature will be high, which will cause the temperature of the motor to be too high, so efforts should be made to improve the working environment. Such as setting up a shed to provide shade, etc. Note: If a malfunction occurs due to electrical reasons, you should ask an electrician with a professional qualification certificate to repair it. People with little knowledge should not make blind repairs to prevent personal injury accidents.

4. Insufficient flow

This is because: the power speed does not match or the belt slips, making the speed low; the installation angle of the axial flow pump blade is too small; the lift is insufficient, the pipeline is too long or the pipeline has a right-angle bend; the suction lift Too high; the bottom valve, pipeline and impeller are partially blocked or the impeller is defective; the outlet pipe is leaking seriously. Troubleshooting method: restore the rated speed, remove the belt grease, adjust the belt tightness; adjust the blade angle, lower the water pump installation position, shorten the pipeline or change the curvature of the pipeline; seal the leakage of the water pump, tighten the packing; clear the blockage Remove the object and replace the impeller; replace the leakage reduction ring and block the leakage.

5. Water pump heats up

Causes: bearing damage; rolling bearing or bracket cover clearance is too small; pump shaft is bent or the two shafts are not concentric; tape is too tight; lack of oil or poor oil quality; balance hole on the impeller is clogged. The impeller is out of balance, increasing the thrust to one side. Troubleshooting methods: Replace the bearing; remove the back cover and install a gasket between the bracket and the bearing seat; check the pump shaft or adjust the concentricity of the two shafts; adjust the tightness of the belt appropriately; add clean butter, which accounts for the bearing About 60% of the internal gap; clear the blockage in the balance hole.

6. Severe vibration

The main reasons are as follows: the electric rotor is unbalanced; the coupling is poorly combined; the bearings are worn and bent; the parts of the rotating part are loose and cracked; the pipe supports are not firm, etc. Adjustment, repair, reinforcement, straightening, replacement and other methods can be adopted respectively. The above situations are common causes of water pump failure, but they are not all causes. When handling failures in practice, due to actual analysis, the principle of first outside first and then inside should be followed, and never operate blindly.

7. Insufficient traffic

This is because: the power speed does not match or the belt slips, making the speed low; the installation angle of the axial flow pump blades is too small; the lift is insufficient, the pipeline is too long or has a right-angle bend; the suction lift is high; the bottom valve, pipe The road and impeller are partially blocked or the impeller is defective; the outlet pipe is leaking seriously. Troubleshooting methods: restore the rated speed, clean the belt grease, adjust the belt tightness; adjust the blade angle, lower the water pump installation position, shorten the pipeline or change the curvature of the pipeline; seal the leakage of the water pump, tighten the packing; clear the blockage Remove the object and replace the impeller; replace the leakage reduction ring and block the leakage.

8. The reason is that the water cannot be sucked

The reason is that there is air in the pump body or air accumulation in the water inlet pipe, or the bottom valve is not closed tightly and the water diversion is not full, the vacuum pump packing is seriously leaking, and the gate valve or flap door is not closed tightly. Troubleshooting method: Press the water up first, then fill the pump body with water, and then turn it on. At the same time, check whether the check valve is tight and whether there is air leakage in the pipelines and joints. If air leakage is found, apply lubricating oil or mixed paint to the joints after disassembly and tighten the screws. Check the oil seal ring of the water pump shaft. If it is severely worn, replace it with a new one. The pipes are leaking water or air. Maybe the nut was not tightened tightly during installation. If the leakage is not serious, you can apply cement or cement slurry mixed with asphalt oil on the air or water leakage area. Temporary repairs can be done with wet mud or soft soap. If there is water leakage at the joint, you can use a wrench to tighten the nut. If the water leakage is serious, it must be reassembled and the cracked pipe must be replaced. Reduce the head and press the nozzle of the water pump 0.5

under the water. 5. The best way to remove silt and troubleshooting The best way?

1. Dry dredging

The dry construction method divides the river into sections and builds cofferdams, and then uses water pumps to drain the river water within the cofferdams. After the water is drained, dredging construction can be carried out , dredging is often carried out along both sides of the river by long-arm excavator excavation or manual excavation according to the site conditions of the construction site. The advantages of dry dredging method are thorough dredging, easy control of dredging depth, high sludge concentration and low transportation cost, so the project cost is relatively low. The disadvantage is that due to the need for cofferdam drainage, it will have a certain impact on the safety of slope protection on both sides. In addition, the construction will also cause serious damage to the existing engineering facilities on both sides and cause secondary pollution to the surrounding environment. At the same time, the construction also requires partial cutoff of the river. Therefore, it is not suitable for construction in the rainy season, nor is it suitable for construction of rivers that are not suitable for cutoff. It can be seen that the dry dredging method is more suitable for dredging small rivers with a certain space on both sides and convenient for flow interruption construction.

2. Semi-dry dredging

Similar to the dry dredging method, the semi-dry dredging method also needs to segment the river channel and build cofferdams. The difference is that the semi-dry dredging method does not need to accumulate water in the river channel. Drain the water completely, but only until it is deep enough for stirring. The construction method uses high-pressure water guns to flush and destroy the river bottom silt, and then uses mud pumps to pump and discharge the mud to the centralized silt treatment area. The slag that cannot be washed away and destroyed at the river bottom can be cleaned manually or excavated by a long-arm excavator, and then transported to a slag truck for transportation. The advantages of semi-dry dredging are that it is thorough and easy to operate, making it easy to cross bridges and other river obstacles. The use of pipelines to transport mud can also avoid secondary pollution during transportation and reduce interference to residents on both sides of the river.

6. If the wifi fails, where can you go to troubleshoot?

As long as your cat is not broken, just call the operator, because you can’t fix the switch or the splitter

7. Classification and troubleshooting of computer faults?

1. Memory failure. If you turn on the computer and it automatically restarts from time to time, or the computer makes a beeping sound, or the system is not running properly and an error is reported, then the general consideration is that there is a problem with the memory. The solution is : Shut down the computer first, cut off the power supply, then open the back cover of the case, take out the memory, clean it, and then insert it back into the original slot. Generally, it will be good to turn it on again.

2. Graphics card failure. When the computer is in use, the sound is normal, but the monitor suddenly stops displaying, and sometimes the screen is even blurry. This is a problem with the graphics card. The solution is: wipe the golden finger area with an eraser, use a brush or other tools to remove the dust on the graphics card, and it can usually be solved.

3. CPU failure: When the computer is in use, it suddenly cannot be turned on and the monitor does not display. If the problem of the graphics card is ruled out, then it may be a CPU failure. The solution is: use a toothbrush or other tools to clean the CPU pins, and it can usually be solved.

4. Hard drive failure. It is normal to enter the operating system, but it is very slow to open the drive letter, or it cannot be opened at all, or the scan of the disk fails. In this case, it is usually a hard drive failure. The solution is: clear the hard drive, re-plug and unplug the various connections of the hard drive, and then reinstall it, usually it will return to normal.

5. Sound card failure. After a certain software is installed on the computer, there is suddenly no sound. This situation is also very common. Usually the software conflicts with the sound card driver. The solution is: if the computer has set a system restore point, then Just restore the system with one click. If it doesn't work, delete the software. If it still doesn't work, delete the software and reinstall the sound card driver.

6. Mouse and keyboard failure. The mouse does not move and the keyboard does not respond. Usually the connection cable of the mouse and keyboard is in poor contact. Just re-plug and unplug and it will be OK. In some cases, there is still no movement after re-plugging. Then restart the computer. That's OK.

7. Monitor failure: The monitor does not display, and restarting does not work. At this time, it is considered a monitor failure. First check whether the monitor power supply is good, and then check whether the signal cable is connected correctly. Generally, it can be solved by reconnecting it.

8. Computer malfunctions and solutions?

Common fault one: No display when starting up

No display when turning on the computer. The first thing we need to check is the BIOS. Important hardware data is stored in the motherboard's BIOS. At the same time, the BIOS is also a relatively fragile part of the motherboard and is easily damaged. Once damaged, the system will be unable to run. Such failures are generally caused by the motherboard BIOS being damaged by the CIH virus. (Of course, it does not rule out that the motherboard itself fails and causes the system to fail to run.). We can plug in the ISA graphics card to see if there is a display (if there is a prompt, just follow the prompts.), if there is no startup screen, you can make a floppy disk that automatically updates the BIOS and refresh the BIOS, but some motherboards After the BIOS is damaged, the floppy drive will not work at all. At this time, you can try to use hot-swap method to solve the problem (I have tried it before, as long as the BIOS is the same, it can be successfully burned in the same level of motherboard.).

Common fault 2: After installing the motherboard driver under Windows, the system crashes or the CD-ROM disk reading speed slows down.

This phenomenon sometimes occurs on some off-brand motherboards. After installing the motherboard driver, restart the computer. The Windows 98 desktop cannot be entered in normal mode, and the driver cannot be uninstalled under Windows 98. If this happens, it is recommended to find the latest driver and reinstall it. The problem can usually be solved. If it doesn't work, you can only reinstall the system.

Common fault three: The mouse is not available when installing or starting Windows

The software cause of such faults is generally caused by CMOS setting errors. There is a modem useIRQ item in the power management bar of the CMOS settings. Its options are 3, 4, 5..., NA. Generally, its default option is 3. Set it to an interrupt item other than 3. Can.

Common fault four: The computer frequently crashes, and it will also crash when setting up CMOS.

When a crash occurs in CMOS, there is usually a problem with the motherboard or CPU. If the fault cannot be solved by following the method, then the only option is to replace the motherboard. Or the CPU. This type of failure is generally caused by problems with the motherboard Cache or poor heat dissipation in the motherboard design. The author has discovered this failure on the 815EP motherboard due to insufficient motherboard heat dissipation. After the computer crashed, I touched the motherboard components around the CPU and found that they were very hot to the touch. After replacing the high-power fan, the crash problem was solved. For problems with the Cache, we can enter the CMOS settings and disable the Cache to successfully solve the problem. Of course, the speed will definitely be affected after the Cache is disabled.

9. Common faults of row drilling rigs and their solutions?

Line fault treatment methods: line break, short circuit, poor contact of plug connector, switch failure, repair.

Battery is out of power. Solution: Recharge.

The oil line is not connected. Solution: Connect the oil pipe to the 100-type and 150-type split drilling rig.

The operating lever is not reset. Solution: The diesel engine cannot start the operating lever to reset when it is under load.

The fast feed and drag button is in the open position. Solution: The diesel engine cannot be started under load, and the button is in the stop position.

The mud rotation button is in the open position. Solution: The diesel engine cannot be started under load, so the button is in the stop position.

10. Common faults and solutions of plate arrangement machines?

Common faults and solutions are as follows:

1. The plate arranger does not rotate: It may be caused by poor contact of the power cord or motor failure. The solution is to check whether the power cord is in firm contact. If the power supply is in good condition, the faulty motor needs to be replaced.

2. The plate arranger rotates slowly: It may be caused by aging of the motor or excessive temperature of the motor. Check whether the power cord is well connected and check whether the machine's heat dissipation is normal. If the heat dissipation is poor, components such as filters or fans need to be cleaned, and motor faults need to be repaired. At the same time, in order to extend the life of the motor, it is recommended not to run the machine for a long time.

3. The plate arranger makes a lot of noise: It may be caused by internal damage to the plate arranger or an imbalance of the machine. The solution is to stop the plate arrangement machine and check whether the carbon brushes, drive gears and bearings inside the plate arrangement machine are loose or worn. If there is a problem with these parts, the related parts need to be replaced.

4. The arrangement of the tray arranger is uneven: It may be caused by the unbalanced bracket of the tray arranger or damage to the parts on the tray arranger's head. Check whether the plate arranger is placed on a flat ground, and check whether the lining or guide wheel on the machine head is damaged. If parts need to be replaced, it is recommended to use original parts to ensure normal operation of the machine.

5. There is a fault alarm on the plate arranger: it may be a fault self-check display. In this case, you need to follow the operating steps in the manual to detect and eliminate the fault, or ask professional maintenance technicians to handle it.

Kurz gesagt, wenn es um die Fehlerbehebung bei der Plattenanordnungsmaschine geht, müssen wir die Fehlerursache sorgfältig analysieren und je nach Situation geeignete Maßnahmen ergreifen, um sicherzustellen, dass die Maschine normal funktionieren kann. Gleichzeitig muss die Plattenanordnungsmaschine regelmäßig gewartet und gewartet werden, damit die Maschine eine längere Lebensdauer hat und effizienter ist.

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