What happens when the computer suddenly shuts down and the host light is on but won t start?

It may be a problem with the power supply, or it may be caused by too much dust in your case, if you are proficient, you can open the case and use an anti-static brush or a paintbrush to remove the dust inside. A lot of the inexplicable problems I encountered when repairing my computer were caused by dust, and if it still didn't work to remove the dust, I could consider replacing the power supply.

I've had this issue as well. Maybe it's because the computer is taking too long. I just use it all day long. But. Sometimes it gets better. I don't know, but I'm here to hear about others.

There should be a problem with the graphics card. Unplug the graphics card and carefully check each capacitor, if there is a bulge, it means that the capacitor has burst, take it to the computer repair station to replace the capacitor (very cheap a few dollars), if you check the capacitor and find that there is no problem, use the eraser to wipe the contact gold finger clean and plug it back in!

It's basically a power supply problem, the computer power supply is insured, if it is continuously turned on for a certain period of time, he will appear in your situation. Check the voltage in your home to see if there is any instability.

It could be a power supply problem.

Test the power supply well, if it still doesn't work, check the memory.

There are four reasons why your desktop computer suddenly shuts down and then doesn't turn on all the time:

1) The first main reason: the power supply of the host is faulty, such as the breakdown of the switch transistor, the fuse is burned, the rectifier diode is damaged, the filter capacitance leakage, the transformer short circuit, etc., there is a problem, the power supply can not be exported, and the voltage and current can not be output. Bend.

2) The second reason: due to the poor contact between the memory and the memory slot, the poor contact between the graphics card and the graphics card slot, the hardware incompatibility caused by the incompatibility, which can not be booted.

Solution: You can turn off the power first, open the compartment, dial out the memory, use the eraser to the part of the gold finger (that is, where there is a copper sheet,) wipe it back and forth a few times, and then insert it back as it is (or insert it back with a memory slot), it's OK, if there is an independent graphics card, you can also use the same method to deal with the graphics card, insert it back as it is, and the person who takes it is OK, (the method of taking the memory module is as follows).

<>3) The third reason: the boot circuit of the desktop computer motherboard is faulty, such as clock, reset, power supply, MOS tube, etc., which may cause failure to boot, black screen, IO problems, unable to start the computer, black screen, etc., solution: send after-sales or repair shop to repair the motherboard, >4) The fourth reason: that is, the graphics card's video memory is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, and the computer will naturally not be able to display.

When the computer host starts, the indicator light turns on and off, and it can't be started.

This situation can be caused by a power failure, hardware failure, or other accessory failure. It is recommended that you take the following steps to diagnose and resolve the issue:1

Check whether the power supply is working normally, you can try to replace another power supply or use a power supply test instrument to check whether the power supply can output normally. 2.Check whether the hardware connections are loose or damaged, including memory modules, graphics cards, hard disks, motherboards, etc.

3.If you have a replacement accessory on another computer, you can try replacing the console's accessory with another computer to test that it works properly to determine which accessory is the problem. 4.

If none of the above methods can solve the problem, it is recommended that you contact technical support or professional maintenance personnel for repair. Please note that during the diagnosis and repair of in-fuel travel, it is important to pay attention to safety, such as avoiding electric shock, scalding and mechanical injury.

First, check whether the power cord has been plugged in tightly after the host, second, check whether the connection cable between the monitor and the host is plugged in tightly, third, the wires on the motherboard in the chassis, each wire is directly plugged in by hand, and there are two cables on the hard disk, plug in tightly, and finally check the memory and graphics card directly, remove the graphics card and memory with an eraser on the gold finger, and install it. If it doesn't work, it may have to be repaired, and the fault is on the motherboard. At the same time, clean the dust on the CPU fan.

Check whether the power cord connected to the fan on the motherboard has been installed, and tighten it directly by hand, when the computer fan does not turn, it will not start, because it cannot dissipate heat to the CPU

2.The host computer does not start, and there is no signal output to the display, the reason may be due to hardware failure such as network card, automatic protection.

3.Two graphics cards, you connect the monitor to the other graphics card, causing no signal output to the display, causing the monitor light to go off.