Location: Home Page > Article Article

What should I do if there is no response after turning on computer?


Our computer may not respond during boot process. This manifests itself in fact that computer monitor does not display anything when you turn on computer, and even power light of case is not lit. Next, I will introduce you to it Solving problem with a computer that is not responding while loading.

What should I do if there is no response after turning on computer?

The most common solution to problem when computer does not respond at boot

The most common reasons why computer does not respond when turned on are: incorrect connection of main power cable of computer, display switch not turned on, poor quality of display power or display data cable. contact.

If computer does not respond when computer is turned on, we first need to see if computer's power indicator is on after pressing power button on computer. Check if power cord of main unit is connected to an external power source, if there is a fault in line, etc. When computer's indicator light is on and processor fan inside computer is working normally, then, generally speaking, we can preliminarily judge that there are no serious problems with power supply. monitor. At same time, observe whether computer keyboard and mouse lights are on. Generally, if there is no problem with host computer, computer keyboard and mouse lights are usually on. In this case, problem often occurs on monitor, such as monitor switch is not turned on, data cable display is not connected properly, or power supply of display is defective, etc.

What should I do if there is no response after turning on computer?

If our computer still cannot turn on after simple investigation described above, it is recommended to use replacement method. If you suspect that problem is with display, you can try it with a good one. If problem persists, try another data cable. Try it, if it still doesn't work, then problem is most likely on host. In short, try to eliminate what can be fixed so that it is easier to find problem. Generally, troubleshooting method for display related issues is relatively simple, so I won't go into too many details here. Next, focus is on failure of computer to respond due to a host failure.

Computer not responding at startup due to host computer failure

How to fix problem of no display when turning on computer. (no alarm sound)

Step 1. First check if computer's external wiring is connected correctly and reinsert each connection to make sure problem is corrected.

Step 2: If problem persists, open main case to check if there is excess metal in case or short circuit caused by main board deformation, smell burning smell in case. case, and whether there are burnt microcircuits on main board, whether capacitors around processor are damaged or not.

Step 3: If not, clean motherboard from dust and check if computer works normally.

Step 4. If problem persists, disconnect reset cable on motherboard and other switches and indicators, and then use a screwdriver to short-circuit switch to see if it can be turned on.

Step 5: If it cannot be turned on, use minimal system method to disconnect data cables of hard drive, floppy drive, and optical drive, and then check if computer can be turned on. display shows a boot screen, then problem lies in these very devices. Then connect above devices to computer one by one. When connected to a certain device, fault reappears, indicating that fault is caused by that device. Finally, focus on checking that device.

Step 6: If error persists, memory, graphics card, CPU, motherboard, or other devices may be causing error. Then use plug-in method, replace method, and other methods to check if memory, graphics card, processor, and other devices are okay. If there is a damaged device, replace damaged device.

Step 7. If memory, graphics card, CPU and other hardware are normal, discharge BIOS, use isolation method, place motherboard outside case, connect memory, graphics card, CPU, etc. to check if computer can display , then install motherboard in case and test until cause of failure is found. If fault persistsIf it fails, you must return motherboard to factory for repair.

Step 8: When you turn on computer, display does not appear, but a beep sounds. When you turn on your computer, system BIOS runs a POST (Power On Self Test). When a fatal error is detected in a certain device in computer, it controls speaker. Make a sound to report errors. Therefore, there may be a failure that there is no display and a sound signal when machine is turned on. If computer does not turn on without a beep, you can check failed device according to BIOS beep value to resolve problem.

No image on load (divided by no image and beep) No image on display:

1. Is power supply working?

There are three places you can check to determine if power supply is working:

(1) Whether cooling fan on back of power supply is spinning. Note. If power supply is defective, its cooling fan will not spin, but it is also possible that fan itself is broken, so you should check other places to determine if power supply is broken.

(2) Whether POWER indicator on panel of host computer is lit. Explanation: The LEDs on host computer indicate operating status of power supply, hard drive, and floppy disk. If these LEDs are off, power supply is probably not supplying power.

(3), Do you hear floppy drive, hard drive, or CD drive sound at startup? Note: The computer will check these hardware devices at startup, if you don't hear these sounds, then they are not powered at all.

If you are sure that power supply is not working, do not assume that power supply is defective, you can check following places:

<1>, if main switch has tripped, if plug has come off, if an extension cord is used, check if fuse of extension cord is blown.

<2>, The power supply stops supplying power due to a short circuit: Since power supply itself is designed with a short circuit detection function, it will automatically cut off all power when it detects that output circuit is damaged. short circuit, which can lead to failure of power supply. This situation can be seen from operation of cooling fan. If power supply is OK and there is a short circuit somewhere inside host, then when power is turned on, fan will stop after spinning and make a buzzing sound. If fan rotates several times after switch is turned off, this symptom is a typical short circuit phenomenon. To determine which component is causing short, you can disconnect all DC output connectors from power source. connectorwires back one by one until short circuit occurs again, it can be confirmed that component is broken and component can be replaced. It should be noted that before pulling out connector and connecting connector, you must turn off power so as not to burn parts of computer.

<3>.Is DC output of power supply OK? If there is no output, power supply itself is defective. Replacing power supply should solve problem.

2. The power supply is working fine, but quiet

(1), monitor problem

If power supply is normal and various LEDs on host panel are lit during startup, especially hard drive LEDs are working, it means that computer has started normally, but there is no image on monitor There is no alarm sound from speaker. Check if monitor's power switch is turned on at this time. You can check if power indicator on monitor is on. If it is not lit, it may be because monitor's power cord is not properly connected, or monitor's power switch is not turned on at all. If light is on, check if brightness and contrast of monitor are properly adjusted. Some monitors will be completely black if brightness is adjusted to lowest level, and of course monitor is not fully displayed. If problem persists, borrow a good monitor to see if it's broken.

What should I do if there is no response after turning on computer?

(2), CPU problem

If there are no problems with power supply and display itself is fine, but there is still no sound, problem may be in CPU, including fact that CPU is not connected correctly (the direction of CPU on SOCKET 7 is not correct or CPU is not inserted correctly). completely), overclocking is too hard, frequency is set too high so that CPU cannot work at all, and CPU core voltage regulation is out of range. above problems are solved, it still does not start. The reason may be failure of CPU itself. Replace it. Try CPU.

(3), others

If first three items have been checked, problem is still not found. The hard drive cable may be mixed up. Please note that side with red wire should be closest to power connector. It may also happen that graphics card, memory and motherboard have poor contact, which will also result in no image when booting.

If none of above steps resolve problem, your computer may have hardware problems, most of which are related to motherboard problems. It is recommended to take it to a professional repair station for repairs.

The above is an introduction to causes and solutions for a computer not responding to download, I hope it can be helpful to you.