degaussing

relay. Also used on the display of the general use of degaussing relays on the coil.Often used in conjunction with energy storage elements to prevent sudden voltage and current changes, providing access. The inductor can pass through it to provide continuous current to the load, so as to avoid the load current mutation to the effect of smooth current. In the switching power supply, a continuation circuit consisting of a diode and a resistor can be se

computer signals out of the display range, the monitor detected abnormal signal to stop working. The user can turn off the monitor, turn it on, and then reset the computer's output frequency. 4. The screen center has the bright spot when shuts down: should send the repair center to repair immediately. This phenomenon is due to the display circuit or the picture tube itself caused by the problem, although not at the time to affect the use, but a long, the picture tube burns, the central black

computer. Then turn off the monitor and reopen it a few times to achieve the purpose of degaussing (the current display has an automatic degaussing function when it is turned on). Third: The screen refresh rate problem. Desktop Right-click-> Properties-> set-> Advanced-> monitor-> screen refresh frequency, CRT adjust to 75Hz or above (laptop LCD screen LCD to 60Hz). In fact, monitor screen jitter is the

(anti-glareanti-static) coating, anti-reflective, anti-static do not have a strong magnetic field of things (such as speakers) placed near the monitor, but the monitor will inevitably be affected by various electromagnetic interference , so the general display has degaussing function, we should be regular (such as one months) to the display degaussing, but note that the same time do not repeatedly use this

televisions, refrigerators, electric fans, such as electricity consumption of large household appliances, if they are too close to the display, these devices will be likely to generate electromagnetic interference on the display. In use, we should put the display in the distance from other electromagnetic fields (the most typical example is not to put the PC speakers too close to the monitor, even the magnetic speakers should pay attention to). Usually if there is a condition, you can often us

, or the internal degaussing line is damaged, the monitor can not be in normal working condition; The four is the monitor and the display card connection is not reliable or the contact between them is bad, this also can cause the display color to be red phenomenon. In addition to the above several main reasons, if the monitor accumulated too much dust, it is also easy to cause the display inside the work parts can not work properly, eventually will ca

monitor will have some adverse effects. The solution is to first move the display position and change the direction of placement, as far as possible away from these wires: the second should use the display with the degaussing function for degaussing, as long as the problem is not too serious generally can be resolved. If through the above efforts color spots still exist, then only find vendors or vendors

/1gb.file bs=64k | DD Of=/dev/nullThe Write/read/speed of the test drive can be calculated by the execution time of the last two command outputs.Repairing the hard driveDD IF=/DEV/SDA OF=/DEV/SDAWhen the hard disk is not used for a long time (for example, 1, 2 years), a degaussing point is generated on the disk. When the heads read these areas, they encounter difficulties and can cause I/O errors. When this condition affects the first sector of the ha

strong magnetic field interference around the computer monitor, magnetic field interference is very easy to cause the computer screen jitter or flicker, the elimination method is to place the computer in another open space to observe, you can go to another place to take a good computer to test the exclusion, as far as possible not to the display near large electrical products. Can also restart the computer monitor to see, the general current display in the open process has automatic

, other people can not access the data. Even if the computer is lost, try to use data recovery software to recover the data, there is no password to access the recovered files, so it is relatively safe and convenient method. 　　Ultimate Solution: Completely destroy the hard drive The final solution, though somewhat extreme but most secure, is to completely destroy the hard drive, you can try to destroy or choose degaussing Service to remo

display can be inverted, so easy to install, the effect is stable. 18. When the display after the use of the dirt is not easy to remove, can be contaminated parts with the mouth ha heat, followed by the use of flannel to wipe clean, the effect is obvious. 19. The internal clutter of the data line, the power cord can be tied up with wire or rubber band, this not only gives people a neat feeling, but also convenient host cooling. 20. Do not use optical mouse in strong light condition, also do

someone else's computer for testing, if the failure disappeared, indicating that the display is bad, need to repair or replace; 3, may be the display refresh rate settings are not correct If the refresh rate setting is too low, it will cause the screen to wobble 4, the magnetic field interference caused the display jitter, the display is very susceptible to strong electric field or strong magnetic field interference, in order to all the interference around the monitor to exclude clean, you c

Q: My monitor can be used normally yesterday, but today, the display of the image color become red, white also turned pink, how do I do? A: You say this problem is more common, belong to the display color. In general, there are several reasons for the display bias, please try to solve them by following these methods. 1. The connection signal line between the video card and the monitor is likely to be poorly contacted. In the case of shutdown, reseat the display connector, and carefully check w

floor of the store's book before the shelves to carry out "magnet". The so-called magnet, is the special magnetic stripe pasted in the book on the page after the part of the cracks, which is also counted as a security measure to prevent the theft of books. If the book is not degaussing will be brought out of the bookstore, the door of the scanner will automatically send a shrill "beep" sound hint. The books that have been affixed to the magnetic stri

hard disk does not exist.6. Safety hazards during the maintenance process such as a hard drive, especially the product shelf life of the new hard disk sent to foreign manufacturers to repair or not degaussing hard drive directly to the destruction of the place into the hands of the wrong person.7. The safety of the scrap process, such as the replacement of the old hard drive has not been fixed by the demagnetization detection and identification of de

magnetic field on the disk affects the resistance value of the head. In this process, the disk won't heat up, but the head is generated with a little heat due to the current change. What about write operations? In turn, the current strength of the magnetic head is constantly changing, affecting the magnetic field on the disk. Because electromagnetic induction is used in this process, the heat of the magnetic head is high. But the disk itself will not heat, because the permanent magnet on the di

count=1000000 of=/root/1gb.file~]# DD If=/dev/zero bs=2048 count=500000 of=/root/1gb.file~]# DD If=/dev/zero bs=4096 count=250000 of=/root/1gb.file~]# DD If=/dev/zero bs=8192 count=125000 of=/root/1gb.fileTest drive Read and write speedThe read/write speed of the test drive can be calculated by the execution time of the last two command outputs.~]# DD If=/root/1gb.file bs=64k | DD Of=/dev/null~]# DD If=/dev/zero of=/root/1gb.file bs=1024 count=1000000Repairing the hard driveWhen the hard disk i

hardware from now on. 21. When installing the three-pin power sockets of the CPU cooling fan, connect the CPU fan interface on the motherboard so that the fan speed can be detected and displayed in the BIOS. 22. Do not put the phone on the monitor or the speaker side, because the text message or call, will interfere with the speaker and monitor the work, emitting noise and display ripple. 23. Computer use for a long time, should be at least a quarter of clean maintenance inside the mainframe

First, check the computer around whether there is interference Observe whether there is a strong electric field or strong magnetic field interference around the computer monitor, magnetic field interference is very easy to cause the computer screen jitter or flicker, the elimination method is to place the computer in another open space to observe, you can go to another place to take a good computer to test the exclusion, as far as possible not to the display near large electrical products. Can

overwritten three times: the first is covered with a 8-bit character, and the second is covered with the complement of the character (0 and 1), and finally with a random character. However, this cleaning method does not apply to media containing highly classified information, such media must be degaussing, or destroy its physical carrier. Of course, for most situations, simple overlay processing is enough. 　　Four, The forgotten corner Deleting and