The computer suddenly crashes, and the power light comes on

This may be a broken graphics card, I encountered such a situation, and finally tried that the memory module was broken. See for yourself if it's broken.

1. Power supply problems, insufficient power supply, or aging power supply, unstable voltage, for the problem that the power supply of the computer is turned on and extinguished, this situation occurs the most, there are new machines, and there are old machines.

2. If this situation occurs in summer, it is necessary to consider whether the external voltage is unstable or too low, because of the shortage of electricity in summer, the voltage of civil electricity in many places will be reduced, resulting in the computer cannot be turned on. If this is the case, you can try adding a differential voltage regulator.

or transformers. 3. Motherboard battery.

If there is no power, a small number of computers will not be able to turn on normally because the motherboard battery is not powered.

4. If there is a problem with the capacitor of the motherboard and burns out or there is a short circuit somewhere on the motherboard, the power supply self-protection will work and the power will be automatically cut off. Such problems generally appear on old machines, and the solution: replace the motherboard or take it for repair.

As far as it is described, the computer self-test does not trigger the shutdown protection or the power leakage spring source does not work normally.

1.discharge, check the various wiring of the motherboard.

2.Also inspect the object is will, return to the power supply that is not resistant to replacement.

There may be a problem with the power supply.

Try to deal with the software side first, but it's more likely that you're having a problem with the hardware.

If the light responds, there is a problem with the connection of the monitor and the monitor companion, and if not, it means that the machine is not guided normally. Follow the following method one.

Item I. item finding.

Excluding connection line reasons, there are the following reasons (in order of common frequency):

1. Loose memory.

Open the side cover of the case, test the active memory on power, and listen for the alarm tone. If there is an alarm tone and a long alarm tone, if it cannot be solved after many times, it should be judged that the memory is broken.

2. The graphics card is loose.

Active graphics card and boot test, if there is a long 3 short alarm graphics card problem, 3, the memory is broken.

4. The graphics card is broken.

5. The motherboard is broken.

Discharge the coms, boot messily and check whether the components of the motherboard are deformed and hot, if there is a motherboard broken.

6. The power supply is broken.

Try replacing the power supply.

7. CPU with bottom reed acacia seat.

Poor contact. amd5200+

The left and right parts of the motherboard.

CPU slot.

The contact with the CPU is not tight, and spacers need to be added on both sides.

Other questions are required.

Specific analysis. Yes, it is best to judge if there is a diagnosis card.

There are also checks. CPU fan.

Graphics card fan. Whether the contact is normal.

Today's computers are ATX power supplies, and they generally have to press and hold the on/off button to turn them off.

If you still can't turn it off, just unplug the power supply.

Problem Analysis:

There are two situations when the computer boots up and the display is not displayed: the monitor is not powered on (the power indicator is not on) or the display is powered on (the power indicator is on) but there is no signal or the screen shows "no sighal", the former means that the circuit is not on, or the power interface or power cable is in poor contact or damaged, and the latter is generally due to loose or oxidized memory modules and poor contact, or the display data cable is not in good contact, or the memory, graphics card, monitor or data cable is damaged.

Handling suggestions:1If the monitor is powered on but no signal is displayed, turn off (if the short press of the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, replug and unplug the memory module, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), if possible, it can also be installed in different memory slots, and then turned on after installation (before operation, you should also touch the wall with both hands to release your static electricity or wear anti-static gloves). If you can't do it, then it's simpler:

Palm or kick the chassis once or twice (pay attention to the location: the front of the shell on the left and right sides of the chassis that does not have an interface at the back; Attention said: Don't push too hard, of course, don't be weak).

The above may need to be repeated, and if it doesn't work, you need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

2.If the above operations do not work, turn off the power and turn on the chassis, reinsert the graphics card, and plug in the data cable between the monitor and the graphics card. If it still doesn't work, consider that the cable or graphics card is damaged, then replace it with a new one.

3.If the monitor is not powered on (the indicator light is not on), check whether the power switch is turned on, then check the back of the monitor, plug the power cord connected to the monitor upwards (the power cord can be replaced if possible), and check whether the other end of the power cord is powered on to the outlet.

4.If the display can be displayed when connected to another monitor or the display of this machine is connected to another normal host and still cannot be displayed, it means that the monitor is damaged and needs professional repair.

First of all, confirm whether there is a problem with the monitor, if there is no problem, it may be that the computer host is abnormal, generally a problem with the memory and graphics card, find someone to repair it.

A certain part in the power supply burned.

Here's how:

1) First check if the monitor signal is in good contact.

2) If there is no problem, unplug the main power cord, then open the case, and check whether the memory, graphics card, etc. are not in good contact.

3) If the memory, graphics card, etc. are installed firmly, then use the replacement method to check the memory, and then boot the device to detect that the fault disappears, so it can be determined that there is a problem with the original memory. Replace a new memory strip for troubleshooting.

New computers are generally prone to faulty accessories that are not installed well or are incompatible, and if possible, it is best to check them with a replacement method after a problem.

1. Use the computer manager hardware to test the temperature of the CPU, graphics card, and hard disk when playing games to see if the temperature is too high and automatically shut down, if the temperature is too high, you need to clean up the dust of the host, and place the host in a ventilated place.

2. Check whether the memory module is plugged in tightly and whether there is too much dust in the memory module slot. Pull out the memory module and wipe the gold finger with an eraser, and clean the memory module slot.

3. Whether the power supply quota is too small, resulting in insufficient voltage, whether it is too close to the quota of the power supply or exceeding. If it is a problem with the power supply, the power supply needs to be replaced.

You try to discharge static electricity, if it doesn't work, there may be a problem with the power supply.