Lenovo T61 rings three alarms, the fan light is on, and it can t be turned on

The first thing you can determine is a hardware issue.

After the power is turned on, the host runs and the fan spins wildly, indicating that the motherboard is completely unable to complete the basic hardware self-test, and the fan spinning wildly is a typical feature.

Therefore, at this time, you can first remove the motherboard battery, discharge the CMOS, and completely restore the default settings of the BIOS, which can solve the crash problem caused by static electricity.

If the discharge is invalid, thoroughly clean the gold fingers of all boards, check the hardware connection, and send it to a repair shop if it doesn't work.

This is mainly caused by the host not booting normally.

1 Usually because the motherboard self-test has not passed, most of it is on the memory, unplug the power after shutting down, unplug the memory, use a clean eraser to erase the gold finger, that is, the metal part of the memory module that touches the motherboard, wipe it clean, and plug it back in basically.

It is usually seen when the memory is added, but the memory is not compatible with the machine, resulting in the memory self-test failing, and the increased memory can be unplugged to boot normally.

2 When the Lenovo computer is started, usually the CPU fan will rotate wildly, and then return to normal speed, which means that the self-test has passed, and your situation is that the self-test has not passed.

3 It may also be caused by your recent CPU dismantling, see if the CPU is not installed properly.

4 If the hard disk is broken, this will not happen, and the computer will pass the self-test and will not spin wildly.

5 There is also a situation, to see if there is any new hardware plugged into the computer, such as graphics card, memory, etc., remove the added equipment first, if it can be turned on normally, it may be caused by the incompatibility between the device and the motherboard.

The reasons why a computer won't boot are complex and can be summarized into two categories: hardware reasons and system reasons. Under normal circumstances, if you can't pass the self-test, it's the hardware; It is the system that can pass the self-test.

First of all, check whether the monitor is connected to the main unit cable and connector normally.

Then start the computer again, press and hold F8 still, select and tap the most recent correct configuration, or press F8 to enter safe mode to restore or reinstall the system.

If it is a hard disk problem, unplug the hard disk cable and reconnect it to see if it can be started; During the boot process, listen to and touch the hard disk with your hand to see if the rotation is normal. If it still doesn't work, it is recommended to send it for repair.

After powering off, replug the memory and remove the motherboard battery for about a minute before reinstalling it! The former can't try the second one first, I hope mine can help you in time!

The memory module has not been detected. Unplug the memory module when the power is off, erase the gold finger position with an eraser, and reinstall it. Turn on and light up.

Restart the computer, press F8, and the selection menu will appear. Select the last correct configuration, try the safe mode, and if you can enter the safe mode, you can uninstall the recently installed software or drivers. If this is still the case, the system will have to be redone.

If the computer can't turn on and can't get into the system, if the hardware fault is eliminated, then the only thing left is that the system itself is faulty and damaged, then we need to solve the problem by reinstalling the system. The method of system installation is recommended here to install the U disk tool.

In this case, it may be that the computer has crashed, so this problem will occur, otherwise it will not cause this kind of problem.

In general, in this case, you should check the computer memory!

Reseat the memory can generally solve the problem caused by poor memory contact.

The main force did not start properly.

You can change it if it's a power supply problem.

The automatic shutdown of the computer is mainly caused by the following reasons:

1.Poor heat dissipation. Due to the influence of weather temperature or the insufficient number of revolutions of the CPU fan, the system overheats, which will lead to the automatic shutdown of the computer, it is recommended to check whether the system temperature is normal.

2.Memory reasons. When the contact between the memory and the motherboard socket is loose, it may also cause the computer to shut down automatically, it is recommended to check whether the memory is plugged into the motherboard.

3.Power issues. The lack of power supply is also an important factor in causing the computer to automatically shut down, but from this configuration, the possibility of this problem is very small.

4.Software factors. Computer shutdowns caused by viruses or Trojan horses also abound, especially the recent epidemic of shockwaves, which can cause the system to reboot and shut down.

If you are using Windows 2000 or Windows XP, it is recommended that you patch the blaster in time after using antivirus software, and the general problem can be solved.

You can try pressing and holding the power button for 10 seconds, waiting for the machine to turn off, and then turning it back on again for 5 minutes.

3 scenarios.

1. The power supply voltage is unstable.

2. The motherboard circuit is aging.

3. The hard disk is damaged.

Go fix it, this is the POST after the Lenovo computer is plugged in, and it generally only lasts 5 7 seconds. You're having a computer problem. It's not a big problem for the host to be repaired.

LAN is a network laid by a broadband service provider in your home directly leaving a network interface, which is equivalent to a large network laid by the service provider, as long as there is a network card on the machine at your home, you can directly connect to the network, and users generally do not need to install any software to access the Internet. ADSL is a broadband service provider that uses ordinary ** lines to lay the network into the user's home, which can save investment. Using ADSL to surf the Internet, generally also requires the user's machine to have a network card, but the user's machine is not directly connected to the network, but connected to the ADSL cat, only through the ADSL cat can access the Internet, the user generally needs to install the corresponding cat driver before use, but the installer will help the user expand everything.

LAN is a network laid by a broadband service provider in your home directly leaving a network interface, which is equivalent to a large network laid by the service provider, as long as there is a network card on the machine at your home, you can directly connect to the network, and users generally do not need to install any software to access the Internet. ADSL is a broadband service provider that uses ordinary ** lines to lay the network into the user's home, which can save investment. Using ADSL to surf the Internet, generally also requires the user's machine to have a network card, but the user's machine is not directly connected to the network, but connected to the ADSL cat, only through the ADSL cat can access the Internet, the user generally needs to install the corresponding cat driver before use, but the installer will help the user expand everything.

Common Causes:

First, if the memory is loose or there is a problem with the memory itself, try to reinsert the memory or change the memory;

Second, the motherboard power supply chip is soldered or rolled and aged, the screen cable is loose or the motherboard short-circuits the screen power supply circuit;

Third, the graphics card, south bridge, and north bridge BGA packaging chips are soldered or damaged, and there are generally more cases of virtual soldering, so it is good to add soldering.

The specific problem of Shiyanzi pants needs to be tested, and I will help you in Beijing.

Disconnect all the useless power supply optical drives, hard disks, etc., take the useless boards, only bring the motherboard, CPU, memory, and polish the gold finger of the memory of the graphics card with an eraser to try it, see if the display has a display, besides, the fan may be turning wildly because the output current is large, and some parts are faulty.

Dear Lenovo users, hello!

It is recommended that you try electrostatic discharge: remove all external devices, remove the battery, press and hold the power button for about 10 seconds, repeat three times, and try to turn on the device.

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