Weak current college】 【computer Troubleshooting "after" first eight.

<br> Compared to other electric products, the computer is an easy-to-out of this or that fault. The computer is out of order, is something many computer enthusiasts a headache, how to address and solve our faults encountered? summary in .this I wrote an article in computer maintenance in the "first rule" after eight, sprat, readers - <br> <br> First, the first survey, the familiar <br> <br> Whether on your own computer or someone else's computer .for repair, it is first necessary to ascertain the failure occurred when the computer's usage and the previous state of repair in order to solve the problem. In addition, on their computer for repair before should also be aware of clear their computer's hardware configuration and the .service life and so on, be targeted. <br> <br> Case study-<br> <br> As an operating system for PWIN98 first edition of computer in use frequent system crashes with "illegal operation" prompt increase in the phenomenon, .very annoying, the user is ready to reformat the disk to reinstall the operating system. I think not so much trouble, I carefully looked at their computer configuration and software and hardware installation and use antivirus software virus checking ... The author asks that users .that have recently installed a new version of IE6 browser is IE6 browser compatibility with their system? I tried to add / remove programs "," bar in uninstall the new version of IE6 browser, restart the computer after the symptoms no longer occur frequently. So .for such a failure could not be a new installation of software or hardware or driver / DirectX etc removed if this does not resolve the problem to be fixed big maintenance work. <br> <br> Second, the initiative after the tank, <br .> <br> For a host or the monitor is not lit, failure of the computer, you should first check the chassis and display of the external parts, especially outside the machine some switches, knobs adjust external lead wire, Sockets have no circuit breaker ., short circuit, do not think that these are not essential for small office, practice has shown that many users of computer failures are the result. When the confirmation machine external pieces of normal, and then open the chassis or display. <br> < .br> Case study-<br> <br> A computer in moving location after the host is not on (host fan will not turn), the user is considered to be the host power in a State of being damaged, open chassis ready to .remove the power supply replacement. The author observes its host and monitor with one power cord from the power outlet connection, but the monitor display properly. In the spirit of the first principle of simple easy after the first host power plug for a power jack on .it, is invalid, it will normally use the monitor power cable to remove the connection host, host back to normal. The line connected to the monitor, nor on that issue from this seemingly insignificant power cord (internal circuit breaker). <br> .Third, after the first mechanical, electrical <br> <br> For the optical drive and printer and other peripherals, first check that it has no mechanical failures and then check for any electrical failure is the General principles of maintenance computer. For example, .the CD drive is not reading the disc, you should distinguish between mechanical reasons (such as problems or bald), or electrical defects. Only when determining the martensii rotating bodies and bald no fault, and then make the electrical inspection. <br> < .br> Case study-<br> <br> A ma year 40 speed CD-ROM drive, the symptom is read from disk. I took apart the optical drive after the first observation about the internal structure of the CD drive, this drive is .all steel structure, generally should not be present more serious mechanical condition, I also put off in it's bald and increase the power of the laser head further "torn" on it. Into a disc, I careful observation about disc rotation and bald to parts .of actions, such as motor and retreat into the situation, find the disc rotation basically normal, motor and retreat nor too big problem, but idling or bald component plus disc, the slide in the slide bar is very difficult to switch off the power, .gently push the hand a few bald components make it slide in the bar, there is a noticeable lag. When I then focused on observation of the optical drive of the sliders to see its top edge of the original should be white oil has become a simple .black, the light of strong local even visible dense dust contamination, it is not surprising that the slide is not flexible. First with pure alcohol will have sliding components of impurity clean, lube oil and then re-added new lubricants and then back on the .machine, read the disk back to normal. <br> <br> Fourth, the first software, hardware <br> <br> Troubleshoot software failures and troubleshoot hardware problems, this is the computer maintenance of important principles. For example WINDOWS system software .is corrupted or lost may cause panic fault, because the system startup is a step by step process, which is not an error if there is a corrupted file or driver, the system dead here. But computer parts of itself, the connectors of the interface .is bad, hardware device settings problem such as BIOS, drivers are perfect, and system compatibility, stability of the hardware power supply units, as well as various parts of the compatibility of resistance to outside interference, etc. may cause computer hardware panic fault. .We repair shall firstly from the soft hard facets to consider. <br> <br> Case study-<br> <br> A computer start after post display on the screen, the "NoROMBasic SystemHalted" information after the panic, the hard drive .light long light does not put out. Exclude hard disk bad track reasons, it is clear that the cause of the failure is hard drive boot program was damaged, causing the system cannot find the hard drive and panic. Fix the failure of many. If .we can use KV300, it can easily solve hard drive boot sector is damaged, its use is simple we can refer to the following documentation author KV300 in this respect is not much, but if you don't have it you can also use a floppy .disk to start the computer in plain DOS, the implementation of the special "FDISK / MBR" command, it can force the correct primary boot program and the end of your hard disk to identify override master boot sectorBut we should note that the command has a .certain degree of risk. <br> <br> 5. After overhaul before cleaning, <br> <br> In the check-box interior fittings should focus on whether a clean look at machines, if found within the various components, leader, .alignment and gold finger between the dust, dirt, spider or excess solder, soldering, etc., should be oil clear, and then make the repair, this can reduce the natural fault and to achieve a multiplier effect. Practice shows that many of the .failures are caused by dirt on clean failures often automatically disappears. <br> <br> Case study-<br> <br> A computer at a time open the chassis and a new video card is installed, a reboot after the monitor screen, .built-in speaker emits a continuous long tone "di di" beep beep sound. Fault analysis: in-the-box Horn continuously, and this is typical of memory errors. Although we carry in the player or the computer may not go to the .dynamic memory stick, memory is a fine thing, it's the enemy is dust, and your computer is in use for a period of time after the chassis may spread a thin layer of ashes, and CPU are more recent memory is the largest of the " .victim ", the CPU fan blowing dust, is likely to spread your memory on a thick layer, slightly shake dust is likely to fall into the memory slot, causing partial or bad, cause starting computer display a black screen and report errors in loudspeaker chassis .. In this case, you should first check for memory installation, free hand first by a few memory and then power on the system, see the contact is good, if not, then you can remove the memory, the memory surface dust cleaned, then .the small larvae-wool brush carefully clean the memory slots, and then plug it in to clean up memory failures can be excluded in General. <br> <br> 6. after the machine before the power, <br> <br> Power .is the heart of the machinery and accessories, if power is not normal, it is not possible to guarantee the normal work of the other part, have no way of checking the level of fault. As a rule of thumb, power part of the failure .rate in the machine account for the highest proportion of many failures are often caused by power, so you can often repair power multiplier effect. <br> <br> Case study-<br> <br> A 15-inch monitor has no raster .no image and can hear the power to issue clear "Squeak" acoustic display fault. Fault analysis: analysis of the phenomenon from the failure to see the power circuit, line scan circuit, the main load circuit failure is causing such a problem. Because of .the power to issue "Squeak" sound that switching power supply is working, so that switching transformer previous circuit basic problems. First multimeter check five output voltage is normal to find power supply filter capacitor as extreme as C117 0V to 5V which should be properly, .the name is clearly not working properly, this indicates that the peripheral circuit components exist short circuit or open circuit. Use the methods of measuring current found L105 current is small, further doubt its previous rectifier diode VD106 have problems, use the Replace method to replace .it after troubleshooting. <br> 7. after the first problems, special <br> <br> According to the common features of a computer failure, to exclude a universality and regularity of the fault, then go check special fault in order to gradually .reduce failure ranges from face the point, shorten the repair time. <br> <br> Case study-a computer to replace the motherboard to restart the computer after a power light on but the system does not post display a black screen. Opening the .chassis, careful observation, found the CPU fan to normal operation, turn off the power after double check card installation, reinstall the memory and graphics card, check the motherboard related jumper, confirmed as correct, use the "minimal system" Troubleshooting, remove the .hard disk drive and other connecting lines, just keep the motherboard, CPU, memory, video card, minimal system successfully opened after system boot. We focus on check drive and hard disk drive connection, when good optical drive after the failure, it is the .drive not good, the CD single in IDE2 bus interface, I check revealed that the optical drive with IDE cable connector on the counter of bumping into, can be connected backwards? look closely on the Real Conservatorio, right after the system is functioning. < .br> <br> VIII. first perimeter, internal <br> <br> In the check computer or accessories of important components, do not be anxious to replace or on their internal or important parts, but you should check the external circuit, while .recognizing that the external circuit to normal, then consider replacement parts or components. If not ask an indiscriminate, replacement parts or components, can only result in unnecessary loss. From maintenance practice, accessories or important parts of the external circuit or mechanical failure well above .the internal circuit. <br> <br> Case study-<br> <br> A unit in the PC, hard drive in normal use, just restart the computer, the hard drive will not find, according to the computer of the operator ., this hard drive a couple of days ago it was the wrong, but after a while he found was that today at work, in normal use, just restart the computer, the system will never find a hard disk. Open the chassis at the hard .drive for three years ago out of Western Digital hard drive as being 3.2G often demolition to copy data to look very old. For such a failure may first check for IDE hard drives after changing the new line, is not valid, try to change the .power plug, the power on again after a hard disk "fatherland" dynamic turn back to normal and OK! installed accessories close the cover to the chassis, and then restart, surprisingly hard drive also disappeared disappeared ... Such repeated several times, the .hard drive will not work properly, but the author as long as the hard drive power cable plug several times, will be back to normal. Could it be that hard drive power connector of the Terminal there is bad, take down, and no rust or .brine. Multimeter to detect Terminal and hard drive circuit board wiring between the on-spot, I found a piece of string (5V) to use the table amount to close to breakover, excluding terminal surface oxidation or solder joint virtual welding, the author spent .$ 3 m to a powerCable wiring, excising connector stripping of copper, it is aa sequentially in hard drive power part of the power socket terminals in the circuit board on the spot on a welding fine, the power wiring of male plug in the power of .a host mother's head, cycled, PC again past the normal. <br>.