sound a common fault: silent sound. There are common causes of this failure:
1. Default output driver for the “mute.” Click the bottom right corner of the sound icon (a small loudspeaker), there volume control slider, below the “mute” option, click the check box in front, clear the check mark in the box, you can properly pronounce.
2. soundcard conflict with other cards. Solution is to adjust the PnP cards used by system resources, so that the card without disturbing each other. Sometimes, open the “Device Manager”, of course, no praise yellow number (conflict markers), but the sound is not audible, in fact, there is conflict, but the system did not check out.
3. After installing the sound card Direct X is not audible. Illustrate this with Direct X compatible sound card is not good, need to update the driver.
4. one channel silent. Check the sound card to the speaker audio cable is disconnected.
Fault II: A sound card emits noise is too large. There are common causes of this failure:
1. Card is not correct. As the chassis manufacturer accuracy is not high enough, production or sound card installed outside the baffle caused by bad sound card expansion slot can not tightly combined with the motherboard, sound card can be seen visually on the “Goldfinger” and the expansion slot reed with dislocation. This phenomenon in the ISA or PCI cards are, are common faults. Generally available pliers revision.
2. powered speakers connected to the sound card input Speaker output. For the active speaker should be connected to the sound card Line out side, its output signal
not through sound card on the amplifier, the noise is much smaller. There is only one sound card output is Line out or Speaker jumper on the card depends on the resolution, the factory default mode is often Speaker, so the jumper to disconnect the sound card.
3. Windows driver that comes with bad. Sound card driver is installed, you should select the “drivers provided by the manufacturer” and not to vote
“Windows default driver,” If you use the “Add New Hardware” install, choose “from the disk Install “instead of from the list box. If you have installed the Windows driver that comes with the optional “Control Panel → System → Device Manager → Sound? ⑹ you break Dao Island Ao Tuo snail house insurance  Valve negligent tanning fence Tiao Zhi Pu, Fu  bath    sash Jie   sash that   Cang Jie  yo ah thin row of U delicate greedy generation Ka Xu  ǜ row of bare thumb and clam sauce  remaining tread  pair of magic emanation Ъ aunt hilly ┑ that   sash Jie?
Troubleshooting III: sound cards can not “plug and play”
1. try to use the new driver or replace the program. I once had a sound card under Windows 98 with the original driver disk to install the driver but also how not installed on, but to replace the driver with Creative SB16, all normal and later progression to Windows Me, not back to normal with Windows 2000 (full version) comes with the sound card driver was normal.
2. The most difficult problem than detected under Windows 9X Plug and Play devices to make your mind has chosen to help you self-install the driver, the driver side is not used, then, will reload every time you delete repeated the question, and can not use the “add new hardware” solutions. I here leakage in a dense detached strokes: enter Win9xinfother directory, the *. inf file for the sound card and then restart all deleted manually after installation, the a hundred percent efficacious, sound card has saved countless lives … Of course, fix the registry can achieve the same goal.
3. does not support PnP sound card installed (and can not practical to install the PnP method The PnP sound card): Go to “control panel” / “Add new hardware” / “Next” when prompted to “have Windows search for new hardware? “, The choice” No “, then select from the list,” Sound, video and game control device “with a choice of sound card driver disk or directly to the type of installation.
Common Fault 4: Play CD silent
1. completely silent. with the Windows 98 “CD player” CD release silent, but “CD players” and working properly, which shows the drive audio cable is not connected using a 4-pin audio cable to connect CD-ROM and sound card analog audio output on the CD-in to this line in the purchase of a CD-ROM will be included.
2. there is only one channel silent. drive output generally about two-wire signal, the middle two lines for the ground because of the audio signal line of the four lines of different colors usually can be found from the color of each line corresponds to the interface. If only one interface or sound card interface and audio cable are each do not match, had to modify the order of the audio cable connection, usually only one of two lines of the change can be.
common Fault 5: PCI sound card sonic boom
generally because techniques using Bus Master PCI cards on the PCI bus hang caused by hard disk read and write, mouse movement when the enlarged operation
background noise sake. Solution: turn off the Bus Master PCI video card features, for into the AGP graphics card, sound card for the PCI slot.
common Fault 6: Unable to normal recording
the first to review whether there is nothing wrong with the microphone plugged into the other jack, and Second, double-click the small speaker, the selection menu on the “Properties → Record” and see all the settings are correct. Then in the “control panel → Multimedia → Device” swap “hybrid device” and “Line equipment”, the They set to “use” status, if the “Multimedia → Audio” in the “Recording” option is gray that may worse, of course, is not without room for rescue, you can try the “Add New Hardware → Systems and Equipment” in additions “ISA Plug and Play bus”, with the sound card simply to reboot after installation tools.
Fault Seven: Music can not play Wav, Midi music
not Play Wav music are quite common, often due to “Multimedia” → “equipment” under the “audio device” is not only one, you can disable a; can not play MIDI files may have the following three possibilities:

1 Early ISA sound card may be due to 16-bit mode is not compatible with 32-bit mode cause MIDI playback is not normal, by installing the software wave table
way should resolve
2 and now most popular PCI sound card using wavetable synthesis technology, some if not MIDI playback is very likely because you do not have to load the appropriate wavetable sound library.
3. Windows volume control The MIDI channel is set to silent mode.
Fault eight: PCI sound card is not normally used in WIN98
some user response, the sound card driver installation process in all normal, and no device conflicts, but the following is not aloud in the WIN98 or cause other problems. This phenomenon usually occurs on the PCI sound card, please check the installation process you plug in the PCI sound card which a PCI slot and some friends for thermal considerations, like the sound card plug away from the AGP slot, near the ISA slot that a few PCI slots. The problem often arises here, because there is a Windows98 Bug: Sometimes can only be correctly identified and inserted in the PCI-1 two-slot PCI-2 sound card, while the AGP ATX motherboard close to the two PCI is PCI-1 and PCI-2 (in some ATX motherboard happens to the contrary, the tight by the ISA is PCI-1), so if you do not have the PCI sound card installed in the correct slot, the problem will be produced.

memory is computer memory One of the most important parts, its role is no doubt, then the memory of the most common failures are what it?
common fault one: boot no display memory
common cause of recurrence of such failure is due to memory and the motherboard memory slots caused by poor contact, wipe only with the eraser from its finger position can solve the problem (do not use alcohol and other clean up), there is memory corruption or memory board tank can also cause problems such failure.
As memory causes no show boot failure, host speakers typically have a long beep (for Award Bios is concerned).
Common Fault 2: Windows Registry is often unwarranted damage, prompt requests the user to restore
such failures are normally caused by poor quality because of memory, it is difficult to be repaired, only replaced one way < br />
Troubleshooting III: Windows often automatically enter the secure mode
Such failures are generally due to the motherboard is not compatible with the memory or memory caused by poor quality, common in high-frequency memory for the frequency that does not support this memory on the motherboard, you can try to reduce the memory within the CMOS settings to see if the read speed to solve the problem, should not, it can only replace the memory of.
Common Fault 4: random crashes
Such failures are generally due to the use of several different chip memory, due to the memory of different speeds to produce a time difference resulting in death

machine, which can reduce the memory speed in the CMOS settings to be addressed, only the same type of memory. Another possibility is that memory is not compatible with the motherboard, such phenomenon is generally rare, there may be additional memory and bad motherboard causing random computer crashes. 01
common Fault 5: to increase the system memory resources, but reduces
such phenomena are generally not compatible because the motherboard and memory caused by , common in high-frequency memory memory for some do not support this frequency of memory on the motherboard, such a failure when you try to COMS memory speed will be set at a low point try.
common Fault 6: Run some of the software is often out of memory to remind
This phenomenon is generally due to insufficient free space on system disk, you can delete some unwanted files, leaving some of the space can be generally maintained at
300M or so.
Fault Seven: Leadership from the hard drive to install Windows to detect the disk space, memory prompted
Such failures are generally due to user participated in the config.sys file emm386.exe file, as long as it can block out the problem.
drive
< br /> CD-ROM is the shortest life of computer hardware components in one optical drive really much scrap value is still a great application, just click on it a little maintenance, which often do not there is any deep knowledge of the radio professional, do not need anything too bulky to use the repair tools and information as long as you carefully look at the phenomenon with reference to failure to fulfill some of the following exclusion means, trust your old drive is still able to restore the old “grace” of.

Common Fault 1: CD-ROM drive light always blinks when working
This is an illusion, in fact, not predicament. the hard disk light is flashing because the same hard disk drive connected to an IDE interface, CD-ROM work control of the hard disk light when the results. drive unit can be connected to a single IDE interface.
Fault II: In the Windows environment to operate on the CD-ROM displays “call failed disk 32 “and then crashes
Obviously, Windows 32-bit disk access on CD-ROM has a definite impact. CD-ROM drive connected to a large sector of the IDE interface does not support
Windows 32-bit disk access, so that Windows generates an internal error and crash. into Windows, the “main group” double-click “Control Panel” and enter “386 enhanced mode” setting, click ” fictitious memory “button and then click the” Change “, the lower left corner of the” 32-bit disk access “check box is closed, the confirmation, and then restart Windows, in Windows, and then into the CD-ROM access does not make mistakes.
Troubleshooting III: drive can not properly read the disk, displayed on the screen: “There is no disk drive X, insert the disk try again”, or “CDR101: NOT
READY READING DRIVE X ABORT. RETRY.FALL? “chance to read the disk out of the box a few times also, but soon not read the disk.
In this case, the first detection of viruses, use antivirus software on the whole machine to check anti-virus, a virus is found if not open the C file editing software available under the root directory of CONFIG.SYS “files to see if the driver has put up the light and the driver is being destroyed, and for processing, but also use a text editor Software View “AUIOEXEC.BAT” file for “MSCDEX.EXE / D: MSCDOOO / M: 20 / V”. If the above two steps did not find the problem, removable drive maintenance.
common Fault 4: drive to use when prompted to read and write errors or diskless
This phenomenon is in large part, had not in place for disk drive to operate on the caused by the failure. All operations on the drive so the disc must be displayed as the instigation of light can be operated like a bit. When playing DVD in time should also be transferred to zero and back to disk, so that you can prevent these problems.
Fault 5: During playback pause the screen when the film VCD or crush phenomenon
check the AUTOEXEC.BAT file in the “SMARTDRV” is placed after MSCDEX.EXE. If so, you should put the statement SMARTDRV
to MSCDEX.EXE before; do not use high-speed CD-ROM party rushed process to SMARTDRV.EXE / U; failure can be eliminated.
common Fault 6: CD-ROM reading the data, and sometimes could not read, and longer time to read the disk
not read the disk drive hardware failures are mainly concentrated in laser head components, and can be divided into two cases: one is caused by the laser tube using long
of old; the other is the optical tube lens surface is dirty or dirty and displacement of the laser tube deformed. Therefore, adjustment of laser power, the need for the optical tube and lens cleaning the laser tube.
photocell and focusing lens cleaning method is: Disconnect the laser head assembly, a flat cable, remember the direction of the laser head assembly apart. Then to see the jacket covered with laser focusing lens, remove the jacket will focus lens invented by the four thin copper wire link to the focus, tracing the coil, the optical tube assembly installed in the hole below the lens in. Thin wire with a small amount of distilled water stick wrapped in cotton cloth (not optical tube with an alcohol wipe and focusing lens name), and see if the lens of the laser tube is suspended, it shall be appropriately adjusted. At this point, cleaning the end.
adjust the laser power. Side of the laser head assembly, as there is a small Phillips screws on the potentiometer. Note the use of color to its initial position under the general first clockwise 5 ° ~ 10 °, not installed on the machine and then counter-clockwise 5 ° ~ 10 °, until a smooth read the disk. Note must not rotate so much that too much power and the destruction of photocell.
Fault Seven: boot drive not detected or detected failure
This may be because the optical drive data cable connector is loose, damaged or the hard disk drive data cable fault caused by jumper settings , and encountered this problem when
waiting, we should first check the drive data cable connector is loose, if found not plugged in, it will be re-inserted, seated. If this still does not solve the problem, then we can got one? Busy neon  Potamogeton furosemide U delicate spring bath of fresh baked allowed sinica first uniform bound in a league  Huai received Aye  favorite scold screen Qiang Yi-Ping  care frightened deer remaining sputum sack Sapporo milk ? set, if there is an error, change it to.

mouse mouse failure analysis and maintenance is relatively simple, most of the fault contact with the interface or buttons poor, broken, dirty mechanical positioning system. A small number of failures for the mouse internal components or circuit Weld, mainly present in some low-quality products, especially in the light-emitting diode, IC circuit damage mostly.
a common fault: can not find the mouse
1. mouse completely damaged and need replacement mouse.
2. mouse connected to the host serial or PS / 2 mouth is bad, take a good line carefully after rebooting.
3. motherboard serial or PS / 2 mouth damage, this situation is rare, if this is the case, had to swap a motherboard or use the multi-function serial port on the card.
4. mouse line is bad, this is the most common. Poor contact inside the mouse over a wire in the circuit board connections. Failure if not then PS / 2 joints, usually not difficult to repair. Usually due to short circuit, or compare the mouse lines are confusing and lead to the reasons for pulling hard, the solution is to open the mouse, then use a good soldering iron to solder joints. Another case is bad inside the mouse cable is caused because a long time due to aging, this failure is often difficult to find, replace the mouse is the fastest solution.
Fault II: the mouse to display, but can not move
mouse dexterity to land, not as the mouse pointer to do whatever they want, but reflected sensitivity, positioning is not correct, can not be moved or wordy. This is mainly due to mechanical positioning the mouse in the rolling axis caused by the accumulation of too much dirt drive failure, resulting in rotation is not flexible. Focus on maintenance inside the mouse X axis and Y axis on the structure of the transfer idea. The solution is to lock slice open the rubber ball, remove the mouse ball to roll, with a clean cloth dipped in a neutral detergent to clean the ball on the rubber, friction shaft can be cleaned using alcohol. Axis at best a few drops of sewing machine oil, but it must be careful, do not flow to the friction surface and the encoder gate stitched. After all the dirt will be removed, to restore mobility mouse ever.
Troubleshooting III: the mouse button failure
1. mouse button no action, this may be because the mouse button and micro switch board too far, or click the switch interval After a period of use and reduced ability to rebound. Open the mouse, the mouse buttons below the glue a moderate thickness of plastic film, the thickness is determined according to actual needs, can be disposed of after use.
2. mouse button can not be normal bounce, this may be because when the key switch in the bottom of the bowl-shaped micro-cracking caused by exposure to fragment, especially long-term use of plastic reed is easily broken. If a three-button mouse, you can remove a button next to that emergency. If it is a good original character designer mouse, you can weld, the open micro switch, carefully clean the contacts, some smooth and fat, the bottles can be used.

keyboard keyboard in use, failure of performance of the situation is varied, the reasons are multi-faceted. A bad failure, mechanical failure with their own keys, as well as the logic circuit fault, Weld, false welding, sealing off the hole oxidation and metal failure. Maintenance according to different fault phenomena analysis concluded that the cause of the failure to find raw production, make the appropriate repairs.
a common fault: some keys on the keyboard, such as space bar, enter key does not work, sometimes, adjustment shall be entered many times before – one or two characters, and some
key, such as the up cursor key is pressed no longer, continuously moving the cursor on the screen, keyboard, other characters can not enter at this time, the need to press in order to bounce
.
this failure as a keyboard “card key” failure, not just use the old keyboard for a long time, asics shoes cheap , a new individual did not take long on the keyboard, The card key keyboard failure can sometimes occur. The card key a keyboard key phenomenon caused by the following two reasons: one reason is the following plug keycap column position offset, making the keycap is pressed with the key stuck in the body shell can not bounce caused by the card key, For this reason occurred soon after the new keyboard or use the keyboard. Another key reason is a long long time after use, return spring elasticity becomes poor, rod friction by shrapnel and larger, can not make buttons bounce caused by card key, because this occurred in long-term use of the keyboard. When the keyboard appears when the card key fault can be allocated under the keycap, and then press the press the lever. If the bomb is not up by rod or fatigue, it is caused by the second, otherwise the first cause. If the body shell as keycap stuck with the key causes “card key” failure, you can key in the keycap and put a spacer between the body, some of the gasket can be slightly harder plastic (such as giving up floppy disk jacket) made, its size is the key to body size or slightly larger than, and in the open position by a rod through the rod itself can ammonium hole through the side, to set in by pole, plug in the keycap; with this gasket against keycap body stuck with the key, you can repair the fault button; if the spring because of fatigue, the resistance becomes large shrapnel card key causes failure, then the body can be special key to open, shoes ecco , slightly stretched return spring to restore elasticity; remove shrapnel restore the key body. By removing shrapnel, reducing the resistance by pole bounce, so that the key failure has been restored.
Fault II: some characters can not enter.
If only one key character can not enter, it may be the key force or joints Weld. Inspection, in accordance with the method described above to open key
plate, with a multimeter measure the resistance profile contacts-off state. If the key does not always turn on when pressed, then button reed fatigue or bad, in need of repair or replacement; if the key is pressed contacts off normal, may be due to cold solder joint, sealing off the hole gold dust or oxidation To be measured along the printing line, paragraph by paragraph, to find fault re-welding; Ruoyin hole oxidation of metal failure, oxide layer can be cleaned and re-weld; if caused by metal hole completely off when the circuit, it may plus welding wire to connect.
Troubleshooting III: If more than one column not in a unified, not in the same line as the key can not enter.
may be somewhere in the column line or line-line circuit, or may be generated logic gate circuit failure. Then used the oscilloscope to detect high-frequency 100MHz, failure to identify the device Weld point, and then behind the line of repair.
common Fault 4: keyboard input and screen display of the characters are inconsistent.
such failure may be due to short circuit the board caused by the phenomenon, which is based on the key that is displayed as the same as the other characters, when used multimeter or oscilloscope to measure, determine fault point after the repair.
common Fault 5: Press a key to produce a string of multiple characters, or when key characters bounce.
This phenomenon is caused by the logic circuit fault. First select a column of characters, if the enter key of a row without a column, a phenomenon may have a number of other characters; if the one with the Enter key, the character will have a bounce and the phenomenon can not last into the system, Check the logic circuit chip with an oscilloscope to find fault with the chip after the replacement of the new chip models, troubleshooting.
Modem
a common fault: 56K Modem is not up to the 56K. If not, please select the correct port, and then click “OK.” COM2 and COM4 have the same problem. Before cleaning with an empty cartridge, first using a needle to try out residual ink cartridges, the cleaner the better, then add cleaning solution (available aftermarket). After the car back to the bit head to clean the pump by a weak nozzle exhaust nozzle of the processing, the nozzle seal protection.