The computer is powered on and turns on automatically, and the monitor does not respond

Seeing that you have changed so much, even if you haven't changed the motherboard and hard disk, maybe a capacitor has exploded! It's so annoying, you might as well bother it a few more times!

You changed so many things, why don't you replace the motherboard, you change the motherboard to try it, and moreover, you look at whether the CPU is good, especially the fan, to see if it moves, this will also affect the above problems, if not, it is recommended to change the motherboard.

You've changed so much, but you can replace the coin cell battery on the motherboard. This can also happen when the coin cell battery is dead. Try a new one.

Replace the hard drive, when you reboot, you heard a "drop" through the hard drive self-test?

If not, the hard disk must fail the self-test and restart repeatedly.

If the hard drive can pass the self-test, press F8 at boot, select the "Disable automatic restart in case of system failure" option, and then reboot again, and you should be able to enter the system.

It should be a fault in the power supply circuit of the motherboard.,There's a short circuit.,Find a master to run down the motherboard circuit for you.,It may also be a problem with the bridge.,Run down and say.,It's not okay to change parts.,The display should have a response.,If there's no at all,It means that the display also has a problem.,Is it a rainy day you turned on.,It's burned?

It should be that the power supply circuit of the motherboard is faulty.

The most common reasons why the computer does not respond when it turns on are:

1. Observe whether the power indicator of the computer is on after pressing the power button on the computer, when the power indicator is not on, then it is likely that there is a problem with the power supply;

2. You can check whether the power cord of the host is connected to the external power supply, whether there is a line failure, etc., when the computer power supply is bad, the computer will not respond when it is turned on;

3. When the computer indicator light is on, the CPU fan inside the computer is running normally, and then check the monitor to see if the power indicator of the monitor is on and whether the monitor data cable is well connected. At the same time, observe whether the computer keyboard and mouse indicators are on, generally if there is no problem with the host, the computer keyboard indicators and mouse indicators are normally on, in this case, the problem often appears on the monitor, such as the display switch is not turned on, the display data cable is not connected, or the display power supply is faulty.

BIOS setting problem, boot, press the DEL button to enter the BIOS, if you don't know which one to change (the motherboard model is different, the specific one is not necessarily), just restore to the factory settings, of course, if the CMOS battery is out of power (the computer date and time is incorrect), the BIOS settings are invalid, so you have to replace the CMOS battery first.

3. The motherboard of the computer is broken. 4. The switch button on the main engine side is broken, or the button is stuck.

Hello dear, according to your problem description, it is recommended that you follow the steps below. 1. If the desktop icon is not displayed after booting, right-click on the desktop to view --- display the desktop icon. So that the icon on the desktop will appear.

The desktop function is also normal. 2. If the problem is that the icon is not displayed and the taskbar is not displayed, you can press and hold the three keys of esc, shift, and ctrl on the keyboard, and press these three keys at the same time. At this point, if the system is fine, the task manager should appear.

3. Click on the Apps option in the top left corner of Task Manager. 4. Click the New Task button in the lower right corner of the program in the application options. 5. Enter "explorer" in the input box to create a new task, and then click OK.

6. If there are other reasons for the lack of auspiciousness, the desktop and taskbar should appear at this time.

Summary. The computer can be turned on but can not enter the desktop, the solution is relatively simple, the specific method steps are as follows: Method 1:

If the computer can be turned on but cannot enter the desktop, you can press Ctrl Alt del to restart. Method 2: 1. First, press the Ctrl+Shift+Esc keys to start the task manager, switch to the process tab, find it, and press the e letter on the keyboard directly to automatically find the one that starts with e; 2. Then end the process; What should I do if the computer can be turned on but can't enter the desktop3, then click the file in turn, and create a new task (run); 4. Enter the last and click OK.

In this way, you can solve the problem that the computer can turn on but cannot enter the desktop. The computer can turn on but cannot enter the desktop, it may be because "Antivirus Protection" is enabled in the BIOS settings. It may also be caused by a boot area error, or a problem with the hard disk, or due to a system problem, or if it is due to a poisoning problem, it will also cause the computer to turn on but not enter the desktop.

The computer will automatically turn on when powered on, but it can't enter the desktop.

Can you elaborate on that a little bit more?

The computer can be turned on but can not enter the desktop, the solution is relatively simple, the specific method steps are as follows: Method 1: If the computer can be turned on but cannot enter the desktop, you can press Ctrl Alt del to restart.

Method 2: 1. First press the Ctrl+Shift+Esc key under the macro slag to start the task manager, switch to the process tab, find it, and press the e letter on the keyboard directly to automatically find the one that starts with e; 2. Then end the process; What should I do if the computer can be turned on but can't enter the desktop3, and then click on the file in turn, and create a new task (run); 4. Enter the last and click OK. In this way, you can solve the problem that the brain can be turned on but cannot enter the desktop.

The computer can turn on but cannot enter the desktop, it may be because "Antivirus Protection" is enabled in the BIOS settings. It may also be caused by a boot area error, or a problem with the hard disk, or due to a system problem, or if it is due to a poisoning problem, it will also cause the computer to turn on but not enter the desktop.

The LCD display has no power is one of the phenomena in the display failure, the LCD display has no power is the display is powered on and there is no display, and the LCD is powered on and does not show how to repair it, the following is for reference only!

The display is powered on and there is no power failure for the display

This is a very simple fault, the general LCD extension internal power supply and external power supply, the external one is more common. Regardless of the power supply, its structure is much simpler than the power supply of CRT display, and the vulnerable ones are generally some small components, such as fuses, rectifier bridges, 300V filter capacitors, power switches, power management ICs, rectifier output diodes, filter capacitors, etc.

The display is powered on and there is no failure of the driver board of the display

If the driver board burns the fuse or the voltage regulator chip fails, some machines have a built-in switching power supply and output two sets of power supplies, one of which is 5V for signal processing, and the other is 12V for high-voltage board point backlight.

1. If there is a fault in the circuit of the switching power supply, it may cause the two groups of power supplies to be not output, first check whether the 12V voltage is normal, and then check whether the 5V voltage is normal, because the working voltage of the MCU chip of the AD driver board is 5V.

2. If you find the fault that can't be turned on, first use a multimeter to measure the 5V voltage, if there is no 5V voltage or the 5V voltage becomes very low, then one possibility is that there is a problem with the input stage of the power supply circuit, that is to say, 12V to 5V. There is a problem with the power supply part, this kind of failure is very common, check the 5-terminal regulator block.

3. Another possibility is that the load of 5V is increased, and the voltage of 5V is pulled very low, that is, there is a problem with the signal processing circuit of the rear stage, and some circuits are damaged, causing the load to increase. Pull the 5V voltage very low, check the components that have problems in the rear stage one by one, and replace the faulty components, the 5V can return to normal, and the fault is generally solved.

4. After the 5V voltage returns to normal, it can not be turned on normally, there are many reasons for this situation, on the one hand, the program of the MCU may not be turned on, and the MCU itself is damaged, for example, the ICU is damaged, so that the MCU can not scan the keys, and when encountering this fault caused by the MCU, it is useless to find the problem of hardware, even if you change the MCU, it will not solve the problem, because the MCU needs to be programmed and coded, In the case that we can't find the original AD driver board to replace, we can only replace it with a generic AD driver board such as: 151D or 161B, etc.