If your computer is connected to a device, you can get a live screen, whether it's a simple text or colorful splash screen message? If the screen displays a message such as "there is not detected video signal," This is the screen that tells you the video port is not communicating, so you should follow the path of "no" to this decision. Sometimes CRT or LCD largest crystal can show a multitude of images or scrolling endless, which means that your video adapter is alive, and trying to convey an image, but the screen can not interpret the signals. This does not happen often with modern LCD screens or expensive forBack to chart diagnosis
Doubled updates as quad-core processors and video adapters interface PCI Express dual power requirements of a typical computer gaming devices. Entry-level ATX power supply for a computer PCI Express games these days is 600W, power supplies ranging from 750W to 1000W is no longer unusual. The main reason is the multi-core processors that can consume anywhere from 10W to 50W or more per nucleus, the total consumption of the CPU up to 200W in a single processor system. At the same time, the Express PCI graphics cards to pull the games as much as 200 watts per se, or to double that in the formation of the double card.
While PC power supply manufacturers boast about its classification, because it is a major selling point, and manufacturers of graphics cards and other accessories not trumpet their own energy consumption. You may need to do a little math to work. Sometimes they give the current peak demand in amperes (A) of the supply voltage, usually 12V, so as to multiply two numbers of the energy consumption in watts. All advanced graphics cards require more energy than can be provided by PCI Express slot on the motherboard, so it will be supplied directly from the power supply to one or two 6-pin PCI Express interface complementary sockets. Old video adapters used in the 4-pin Molex engine.
A quick search on the Internet will help you find a number of calculators to determine the power requirements on the basis of installed components. If the power supply boasts a peak output rating, do not use as your guide. Maximum power is not viable, it is only meaningful metric for devices with transient requirements, such as electric motors cars can exceed the maximum safety rating of power for short periods during acceleration. Can PC Power requirements remain stable for a long time, and I love to make a good margin of 20% for the error on the calculated maximum demand.
Back to chart diagnosis
If the power comes on the screen, but it did not go live, try switching back down again and try again. Programmable switch may require you to press the power button for a few seconds before the power goes off again. If you refuse to go out, see if there is a bypass switch on the back of the display. Otherwise, you can turn off your power strip, if you use one, or just pull the plug. If you start the computer in and turn on the screen after the second or third attempt, it is likely a result of poor communication between the motherboard and power supply in all parts of the signal POWER_GOOD.
It is assumed that the power to delay POWER_GOOD signal which tells the CPU supply is safe to start until the current output stable. This signal allows the processor to shut down if the power becomes unstable during normal operation. I only saw this problem with cheap or non-feeders, although ironically, some of the cheapest supplies fake signal POWER_GOOD link outputs 5V. If the signal POWER_GOOD incorrect, the computer will try to work even when the power of the specification, which can easily lead to errors facts before falling low voltage sufficient to cause the accident.
Back to chart diagnosis
Beep reported by the diagnostic checks BIOS of the motherboard during the activation codes. A beep means one function (Power On Self Test) was a successful experiment and said CPU, memory, video adapter, all present and accounted for. It is usually due to hardware failure (or pressing a key on the keyboard) and voice and symbols based on the manufacture of longer chains of beeps. A large series of slow beeps usually associated with bad memory unit, and repeat sequences of 3 or 9 beeps often refer video card failure. In one of these cases, close, disconnect, and then try to re-load either RAM or video adapter, although it can not hurt to do both. If you get a beep with vivid screen, and the problem is unlikely to be associated with the power supply. Continue into the motherboard, CPU and RAM memory failure diagnosis.
Back to chart diagnosis
If you do any work on this issue immediately before the failed startup, undo, even if it means reversing the old component again. If a new component of the power supply stabilization prevents due to excessive energy consumption, and should cause the power to block the signal POWER_GOOD, and prevent the mother from trying to boot. May be a boot failure unrelated to the new item, but it was possible that the publication of the clip left loose screw rolling around, or defeat adapter while working on this issue.
Back to chart diagnosis
Can usually noisy fan power supply cleaned or replaced very easily, despite the fact that you have to watch for large capacitors in the power supply, and when it opened, even after they are separated. Fans may also fail issue and make noise, such as fans Heatsink CPU's, video adapter, or motherboard chipset. And make sure the fan noise is not due to anything cling to the grill and hit the fan blades. If your kids to hear the whistle to do so, and perhaps the biggest of earshot, this is not necessarily power supply either. I tend to let these things alone on older computers if you do not bother anyone.
High-quality power supply ship with PWM (Pulse Width Modulation) fans, which are able to work in many control is slower than the fans of the level of effort. PWM fans require four leads inputs, land, 12V, output tachometer input and PWM control. Fans with two or three cables can only be controlled by changing the input voltage. PWM fans usually can run to about a quarter of the nominal speed, where fans will usually controlled effort to stop working well before falling to half the nominal speed. It will make a big difference in noise performance at the upper air circulation, measured in CFM (cubic feet per minute) is not required.
Back to chart diagnosis
If you receive a text message on the screen that does not refer to a hard disk controller, predictive error, or any message mentioning the operating system, lost files, etc., to open the ATA scheme engine failure. If your power supply is noisy with chronic whistling or humming capacitors, which can be a good enough reason to replace it. If you go to other schemes to settle your computer and reboot at random times, the problem can be a good quality power supply, even if the computer boots normally.
If you have experience in working with digital volt meter on the trends of living, you can try to check the voltages on the party Mosul to see if they are within a reasonable tolerance voltages. It depends on whether you are thin enough and whether there was an adjoining room for each wire on top of the coupling of the catheter insertion detector is. Unfortunately, the simple DVM does not appear if there is AC ripple voltage DC, which can cause all sorts of problems, if it is bad enough. And multi-expensive with a sample capacity, holding and sampling frequency in a few fractions of a second can be the minimum / maximum DC voltage pick up, pointing to the existence of the waves do not see it as you do on the oscilloscope. This test also requires investigation Back ATX connector or the introduction of break-out between the ATX connector and motherboard box. Testing must be performed with the power supply is connected to the motherboard of the load and is only recommended for experienced technicians.
Unstable voltages and AC DC ripple really ghosts in the machine, and can simulate all kinds of other problems. If you have a flaky to the situation that can not be diagnosed and has already begun converting components fails, you can also try the new power supply as well. I have seen the power supply produces some really strange cases of failure, such as rebooting the computer when you set your coffee cup down too hard on the table. The most common problems in the stable of the headquarters of the random detention or spontaneous reboot supplies. Modern motherboards have the ability to adjust the power they receive, but it should be within a reasonable range, the power supply should cooperate with its own production monitoring and reporting by POWER_GOOD signal.
Back to chart diagnosis
If you do not force Come on, take the time to verify the connecting cable jack and live securely in the back of the power supply. You do not need to DVM (digital volt meter) to check your power outlet. Unplug the power cord from the outlet and plug in the light of work in the same port to try it. Do not assume that all the components in the energy sector only work for the operation of the development of the energy sector, I am always on the light coming through the power strips with one or more bad games. Power cable is bulletproof Basically, if not intersect with something, but if your computer is moved or gets kicked cable, it is easy for the cable slightly to withdraw from the slot in the back of the power supply and still look as if plugged in.
Back to chart diagnosis
The novel, energy and supplies high-quality generally "Comprehensive Input" or "full spectrum" so-called, and will work in any AC voltage from 90V to 240V at 50 Hz or 60 Hz. While the supply voltage should not be an issue with the former work computer, if you replace the power supply or transport system, it is always a possibility. The power supply shipped with older manual switch to select the correct voltage (110V / 220V). This little red slider switch on the back of the power supply is usually between energy and turn on / off the bypass wire. You should always disconnect the power cord before changing the effort, because modern power supply ATX always live when plugged in. Although it is not recommended to try out if you connect the power supply to switch to 220V 110V socket in a country like the United States, can not continue to operate when the correct voltage. But if the power for the benefit of 110 V in a country with 220V distribution, you'll probably burn the security of supply (at least), and possibly supply and accessories related damage.
Back to chart diagnosis
One obvious reason the computer does not start when you press the key is if the master key of the motherboard season. Described this usually leads PW-ON or PW and access to the front of the computer case on a small group of metal pins in the case of connections to the motherboard. It is not at all uncommon to encounter this problem if you have done any work inside the case, because the wires are not glued in place and the communication is not tight. So if you have established a number of computers in your life, it's normal to get this error connection when replacing or installing new motherboard due to the identification of the poor of the nails in the body of Mosul. On the bright side, the key is not polarized, so you only have to get the right two pins, and not a trend. I have met and where the printed book that comes with the new motherboard does not agree with the printing on the same motherboard to run the various groups in the body pin connector. I always go put the motherboard marks in such cases.
Back to chart diagnosis
Make sure the power switch which is really working with a meter to regulate the continuity, or just check for a short period when you close the switch if the meter measures your only ohms. Technology ATX computers do not change the direction of the line, as did the previous generation AT power supply. Transformation is the only dual-input logic on the motherboard, which always live partly in the ATX system is plugged in. Motherboard trace programming to tell the power supply is fully closed or the next, depending on the settings. Transformation itself can be used to wake the computer from standby mode. This is not the computers that are outdated where you see the heavy power cord goes into great transformation, but gone to a great extent these systems.
When the address where the power switch on the ATX system did not have a meter with me, I'm just short on both the labels on the power switch on the body of the mother board connector with a screwdriver to see if the system will began. Since it is a test of live force, do not try this if you were not comfortable working with live equipment can jerk off in surprise when the power comes. You could end up stabbing the motherboard or video adapter with a screwdriver, and responses only act, and do serious damage. When faced switch failure and has no alternative on the one hand, you may be able to scan hard reset switch present in previous cases.
If you think that your motherboard badly damaged by a power surge or short, it is likely the circuit breaker has failed or that the power supply is an immediate halt to protect themselves from high energy consumption. Living force another test for technicians with experience to overcome the parent switch circuit unplugging all power supply leads to the motherboard and then reduce the lead P_On green on black lead to the standard power connector ATX 20 or 24 pins. But switching power supplies require a load of work so you have to keep your hard drive is connected.
0 comments:
Post a Comment