Why does the machine not respond and does not self test after turning on?

Try cleaning the dust off the memory stick, wipe the gold finger of the memory module with an eraser, and use the CMOS jumper to restore the Bois settings, and if the problem is not resolved, try flashing the version of the BIOS.

If the power is turned on, the display does not respond to the signal. Detect the graphics card.

Regardless of whether there is an alarm or not.

The landlord has to carefully inspect your hardware.

Because this phenomenon has a lot to do with the motherboard.

Because I can't pass the self-test.

Of course, it also depends on the memory and graphics card.

Plug them back in.

Then see if there's anything wrong with the motherboard.

For example, where is the south bridge or the capacitor is drummed or something.

It's not some kind of fake animation.

It's a precursor to the hardware not working.

It is recommended not to turn on the computer first and test the hardware well.

If you don't burn it, the gains outweigh the losses, hug the Lord.

1. It may be that the memory module is in poor contact, you should pay attention to the fact that the computer needs to be cleaned at any time, and it may also be that there is dust in the slot where the memory is inserted.

2. Graphics cards are also possible.

3. Check your hardware device, and turn it on after all the checks are completed.

The main thing is to test your hardware, such as your motherboard, graphics card and memory, capacitors on the motherboard, etc.

It should be your hard drive problem. It used to be the same with my computer.

Backbite.. Backbite.. Backbite.. Trinities are generally memory.

Long and short tones are usually graphics cards.

There should be a hardware problem, you clean up one in the chassis, unplug all the boards, clean them, and plug them back in.

It could be the cause of the dampness of the memory.

1. First of all, check whether the external wiring of the computer is connected, and plug in each cable again to see if the fault is eliminated.

2. If the fault persists, then open the main chassis to check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, and smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, and whether the capacitors around the CPU are damaged.

3. If not, clean up the dust on the motherboard, and then check whether the computer is normal.

4. If the fault is still known, then unplug the reset cable on the motherboard and other switches and indicator wires, and then use the change cone short-circuit switch to see if it can be turned on.

5. If you can't turn it on, then use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one, when connecting a certain device, the fault will recur, indicating that the fault is caused by this device, and finally focus on checking this device.

6. If the fault persists, the fault may be caused by memory, return card, CPU, motherboard and other devices. Then, use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal, and replace the damaged equipment if there is a damaged device.

7. If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, then install the motherboard into the chassis for testing until the cause of the fault is found. If the fault persists, you need to return the motherboard to the manufacturer for repair.

8. When the computer is turned on and started, the system BIOS starts to POST (power-on self-test), and when a fatal error is detected in a device in the computer, it will control the speaker to send out a sound to report the error. Therefore, there may be a fault that the power is turned on without displaying an alarm sound. If the computer is turned on and there is no alarm sound, the fault can be checked according to the meaning of the BIOS alarm sound to check the faulty device to eliminate the fault.

Use the method of elimination.

Disassemble the chassis. Unplug the memory first. If you hear a long alarm sound when you boot up, it is a problem with the memory, which means that in addition to the memory, everything else has passed the self-test.

Wipe the gold finger of the memory, and be careful not to erase the patch on the top! The very small one. Then use a small brush to brush the memory slot clean.

If there is no alarm, continue to unplug and then unplug all power cables and data cables of the hard disk and optical drive. Pull it from the other end of the motherboard. Boot test, if you can self-test and then rule out whether it is a hard disk or an optical drive. The hard disk optical drive or data cable is broken even if it does not turn on.

If you still don't self-test, pull out the graphics card. If there is an alarm sound, it will be handled like the memory, wiping the gold finger and the graphics card slot. There is no alarm to pull out the CPU.

Before the alarm sounds, take out the motherboard and put it flat in an insulated place, plug in everything, unplug all the cables from the chassis panel, and leave it for a few days. Because the chassis deformation squeezes the motherboard circuit unsmoothly, resulting in frequent reboot crashes and no self-check, I have two such motherboards here. Now the workmanship of the chassis is far less than the previous quality is too poor, it is recommended to buy a good chassis when buying.

good luck