If there is no electricity supply, check the electricity situation of PC power supply interface and power supply line
1. Check the chassis power interface and power lines, is intact. If the interface and power lines are damaged shall be replaced broken;
2. Check the motherboard power cord jack. If not broken, it will pull out and then insert the jack. General can be solved, because the motherboard is bad the situation led to no electricity;
3. Check the switch on the chassis FUJIFILM np-40 battery power supply to see if it is properly connected with the motherboard. Check the jumpers on the motherboard, find the control power of the jumper, try to cut short the jumper pins, if the motherboard can operate normally, which indicates that the jumper has been a problem. Mainly due to the jumper pins and the jumper cap is bad. Cut short jumper pin can make the full coupling between the two.
Electricity supply OK but still black screen
1. Check all of the cards, graphics cards, sound cards, CPU, RAM is installed in place, if good contact is stupid way is to pull out them, and then re-insert in. Check all interface cards and interface is good contact. The benefits of this treatment is a blank screen, one by one eliminate the problem, they would rather kill a thousand, not given a statement or a purpose is to examine the issue.
2. If the issue is too serious to have to use the most cruel trick, unplug all the minor nature of the original parts. Disconnect all the secondary sexual power lines, including the IDE floppy drive and other equipment. All you need is the most basic initial startup screen memory self-test data. Motherboard, CPU, RAM, graphics card and so on. If the test passed. One by one add other components to add a self-test once. If the test pass, you find a problem, which is not properly installed or not compatible with other issues to be solved.
Check the general steps:
1. Open the case, first check the BIOS reset pins.
2. Just insert a memory, try several times, usually memory problems. Memory problems may or may not self-police, the best by a good memory test, or the memory into the CASIO np-60 battery machine on the judge friends.
3. Startup floppy disk, hard disk light is not on the motherboard may be bad.
4. Memory self-test passed, floppy drive, hard disk indicator light, will not start.
Restart the machine, press the F8 key to enter safe mode to see if it can be easy to handle, the system can be restored. Not to use the DOS boot floppy, see if you can access the hard disk, can enter to see if you did GHOST backup clone, and some machine factory to do a good job, could not get to format the hard disk reinstall system.
Computer black screen troubleshooting
For computer processing basically excluded black, replacing the combination of methods, the principle should be replaced in a suspicious rule out the biggest part. For ordinary computer users is concerned, lack of expertise, can cause failure analysis, follow these steps to make your own troubleshooting.
First check the contact is good. Check the video card and monitor, respectively between the contact is good, the graphics card and motherboard I / O is good contact between the slot if necessary it can be removed and re-install time, ensure that the installation place, a good contact. If the access is no problem, it is best to replace a monitor to try to identify the monitor, no problem. If the monitor is no problem, view the cpu fan is running, such as running, with a multimeter measure the voltage output is normal for the ± 12V, ± 15V, if not normal to try for a Acer aspire 5720 battery power supply.
If still a blank screen, then remove the components installed inside the computer, leaving only the cpu, video card, memory, you can limit the cause of the malfunction cpu, motherboard, memory, among the three. General If the memory is faulty, the alarm should sound. If you exclude the memory failure, and only the cpu and motherboard. For a normal cpu (should be compatible with the detection of computer), start re-testing, if still a black screen appears, you can only change a motherboard, the question should appear on the motherboard.
Computer black screen computer failure may indicate more serious problems exist, it may appear black in the phenomenon to be excluded by the above method. Should be flexible in processing applications excluded, substitution method for the timely processing phenomenon to be eliminated.
1. When the display is blank no image is displayed (the display currently on the market, but no signal sent to the host, the screen will display “No signal cable”), first check the host power is a good plug, power supply fan spins? Host panel power indicator, whether the hard disk light is flashing light? If the system does not work because the power supply or motherboard no electricity, the monitor signal is received in the absence, of course, there will be no image displayed.
2. Check the monitor and then plug the power supply is good? If your monitor’s power switch is a touch switch, when you power up the monitor, you should hear a slight “provision pop” sound, then the monitor can determine the switching OLYMPUS li-40b battery power supply circuit is good. Then the monitor’s power switch is turned on? Monitor power light is lit? When the hand near the display screen and move it slowly there hissing sound, while the hair on the hands of the feeling of being sucked, which checks the monitor is working the high-voltage circuit.
3. If it is determined the display has been added to electricity, and there is high pressure occurs, continue to check the monitor cable connector and the signal output interface card is a good contact? Are there loose? Unplug and then check, D-type interface for bent or broken needles or have a lot of dirt. This is a problem often encountered in many users, when connecting the D-type socket, non-uniform force, or forget to tighten the screw interface, the interface to loose cause bad contact, or because of improper installation or excessive force, so that D There are needle-type interface, or a curved needle, resulting in poor contact.
Note: the data display 15-pin plug may have a shortage of needles, such as 4,9,11-pin, then normal, do not artificially supplemented by other wire to pin these missing bits, so as not to cause other problems.
1,2,3-pin for the red, green and blue guns signal input, if any of you bad needle contact with the MOTOROLA GP340 battery screen there will be lack of appropriate color. If the first pin 12,15 there is a problem, the host can not find the appropriate display, but this does not affect use. If the first pin in question 13,14, the display will appear black, the display lights in the boot from green to orange after a while. Also appeared in one of the black screen.
4. Open the case to check the display card is installed correctly? Is in good contact with the motherboard slot? Video card or slot is too long and the use of too much dust, as well as causing poor contact? Whether the chip on the graphics card burned, traces of cracking. When the causes for black screen graphics, the computer POST a short time that is four long beeps prompt. Installing graphics card, graphics card to hand hold the upper part, even forced into the slot, so that the screw graphics port and port match the main chassis of the screw. Do not force plug is not fixed, resulting in distorted graphics. If the confirmation is installed correctly, you can remove the card wipe with alcohol cotton ball for about pin cheat, or a slot (only for PCI cards) installed. If does not work, can only be a good graphics card for a try the next. If that does not, in determining the graphics intact, they must also consider the graphics card and motherboard compatibility.
5. Check the other boards (including NIKON EN-EL14 battery sound cards, Decompression Card, video capture card) slot on the motherboard is good exposure? Note Check the hard disk drive data cable and power cable connection correct? Replace other card slot, cleaning pins. This is often easy to overlook many people. Generally believed that black screen computer monitors and graphics cards is the issue, and other device-independent. In fact, because the sound card and other equipment is not installed correctly, cause the system to be completed in early to make of the difficult, especially in the hard disk drive data cable and power cord to the wrong, the fault likely to cause no display.
6. Check the memory is good contact with the motherboard? Reseat the memory or try another slot, or the replacement of the memory. If the memory problem, the computer starts, there will be a continuous rapid beeps. Tone varies because of the motherboard.
7. Check the CPU and the motherboard CPU Block access to well? Due to moving or other factors, the battery shop CPU socket with the SLOT1 jack or SOCKE370 bad. Best removed by hand pressing a CPU or CPU and then re-install again.
8. Check the CPU FSB, multiplier, memory frequency jumpers or CMOS settings are correct. Motherboard manual control, one by one check the relevant jumper, the order of “CPU FSB Frequency Jumper Jumper-CPU – RAM frequency jumper.”
9. Check the CPU voltage is set properly. Set CPU voltage jumpers to be careful with the CPU must match the operating voltage. VIII and IX to this two-step assembly machine or like some overclocking black screen appears when the user double-check.
10. Check the CMOS parameter settings are correct. If your computer is equipped with two graphics cards in your CMOS settings is the first initialize PCI graphics card, and your only monitor connected to the AGP graphics card, of course, the display is not bright.
11. Check the host and display the required whether the work environment? Voltage is normal, the ambient temperature is not too high. In addition to checking the above steps, but also the working conditions according to the computer to quickly locate, such as the power is turned on the host, you can hear the beep is heard that the computer self-completion, if the hard disk light is constantly flashing at this time, it should be In the second step to the fourth step checks.
12. If the monitor in the universal laptop ac adapter computer displays the contents of the startup process, only after loading WIN98 black screen when the screen, which is WIN98 system software problem.
The inspection method is based on the display itself has no electrical fault, that is, the power the host turned the monitor’s power indicator light from green to yellow, but did not display a black screen image display. If you use these steps to display still no display, should be invited to professional maintenance.
