Hello, my E540 has a black screen when it is turned on, and the indicator light fans are normal, but

Dear users, hello!

Hello, you can try the reset operation.

Reset: Please unplug the power supply, battery, and other external devices from the computer (make sure the power is completely off); Then press and hold the power button for about 20 seconds; After that, connect the power supply and battery to the machine, and then turn it on. If it is invalid, send it to the local service station for inspection and maintenance, and check the address of the service station.

Poor system compatibility, system files can go to the official website of the rainforest wood wind start disk to find a technician for free, with the rain forest wood wind flash drive startup disk one-click installation system, encounter computer problems can also enter the rain forest wood wind flash drive official website discussion group for discussion or directly consult the technician of the rain forest wood wind start disk official website.

Rainforest Wood Wind U Disk Start Tray System, make U disk startup disk with "Rainforest Wood Wind U Disk Start Production Tool", **Install - Run "Rainforest Wood Wind U Disk Start Production Tool" - Insert U disk according to the prompts - Start making - Finish production after one minute.

Rainforest wood wind U disk startup disk one-click installation main steps:

Step 2: Use the rain forest wood wind U disk system software to make a boot U disk.

Step 4: Enter the BIOS to set the boot sequence of the USB flash drive (this step can be skipped, you can press the F12 key or F8 key or ESC key to select the USB flash drive to boot during boot).

Step 5: Use the USB flash drive to start the quick installation system.

One-click installation, just follow the prompts and click the mouse.

The detailed one-click installation tutorial can be learned on the official website of the rainforest wood wind USB flash drive, or you can ask the technician on the official website for computer technology.

What kind of people are messing with these,Press the power button It is recommended to check whether the fan hard disk is normal,If there is no response, it may be a power supply or motherboard problem,If there is a response, it may be a problem with the graphics card、Motherboard、Memory,I think the problem of the graphics card may be bigger,Take the memory off and turn on the computer to see if the screen is lit up, there is an alarm, the screen is not lit,It is recommended to find someone to detect the graphics card and the motherboard。 You can also connect an external monitor to detect it.

After shutting down, check the position of the graphics card to see if it is loose, after installation, unplug the memory module and erase it with an eraser, install it again, and try to turn it on again.

Repair the motherboard. 1.If the boot circuit of the motherboard of the laptop fails, the clock reset, the power supply MOS tube, etc., it may cause the inability to open and conceal the computer, the black screen, the problem of Io, and the black screen of the computer.

2.That is, the screen line of the notebook is broken or the contact is poor, resulting in no image signal transmitted to the screen to display a wide star, that is, a black screen, the solution: let the person who repairs the notebook replug the screen cable, or replace the screen cable. Be cautious.

3.The first is that the video memory of the notebook graphics card is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, because the graphics card is broken, the screen will naturally be black, and the treatment method: Jianyi repairs the graphics card, or replaces the graphics card.

4.This is because the memory and graphics card of the notebook are oxidized, resulting in poor contact with the memory slot or graphics card slot, resulting in the inability to turn on, and the black screen has no display.

Solution: It is to remove the power supply, open the back cover of the notebook, take out the card slot of the memory, if it is not an independent graphics card soldered to the motherboard, also take out the card slot, align the part of the memory and the gold finger of the graphics card (that is, where there is a copper sheet) and wipe it back and forth with an eraser, wait for the copper sheet to shine, and then blow the ash and then plug it back into the boot.

ThinkPad E420 has a fan after powering on, and the display does not light up Reasons and solutions:

First try the following operations: remove the battery and power adapter, press and hold the switch button for 30 seconds to discharge the static electricity, wait for about 15 minutes, and then connect the power adapter separately to power on; If it can't be turned on yet, it is the following reasons.

1) The first reason: the boot circuit of the notebook motherboard is faulty, such as clock, reset, power supply, MOS tube, etc., which may cause failure to boot, black screen, i o problems, unable to start the computer, black screen, etc., treatment method: send after-sales or repair shop to repair the motherboard, 2) The second reason is that the screen line of the notebook is broken or poorly contacted, resulting in no image signal transmitted to the screen display, that is, a black screen. Solution: Ask the person repairing the notebook to plug the screen cable back in, or replace the screen cable.

3) The third reason: that is, the video memory of the notebook graphics card is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, because the graphics card is broken, the screen will naturally be black, and the treatment method: Jianyi repairs the graphics card, or replaces the graphics card.

4) The fourth reason: This is the memory and graphics card of the notebook are oxidized, resulting in poor contact with the memory slot or graphics card slot, resulting in the inability to turn on, and the black screen and no display. Solution:

Solution: It is to remove the power supply, open the back cover of the notebook, take out the card slot of the memory, if it is not an independent graphics card soldered to the motherboard, also take out the card slot, align the part of the memory and the gold finger of the graphics card (that is, where there is a copper sheet) and rub it back and forth with an eraser, wait for the copper sheet to shine, then blow the ash and then insert it back, cover the back cover, and the boot is generally OK.

5) The fifth reason: there is a problem with the display of the notebook, such as the crystal of the LCD screen is damaged, the main chip of the driver board circuit is damaged, the main chip of the LCD circuit is damaged, and the power supply regulator is problematic, which may cause the notebook display to be unable to display.

Hello! It is recommended that you perform a reset operation:

Please unplug the power supply, batteries, and other external devices from the computer (make sure the power is completely off); Then press and hold the power button for about 30 seconds; After that, connect the power supply and battery to the machine, and then turn it on.

If the problem is still not solved, it is recommended that you go to your local Lenovo service station to check it, and the service station staff will solve the problem for you.

Hope it helps you and I wish you a happy life.

Lenovo E540 After turning on, the red light keeps on and it can't be turned off, and the screen keeps black and can't be displayed, what should I do? What to do? Ask for help.

1. Remove the battery and unplug the power plug. Use a Phillips screwdriver to open the back cover screws (generally notebooks have a small separate cover, just unscrew the screws of this cover) 2. There is an opening on one side of the cover, and gently the cover along this opening with a screwdriver. This cover can then be removed.

3. Remove the cover and find the memory module. Use a screwdriver to gently unplug the clips on both sides of the memory module so that the memory module can be released. 4. Gently remove the memory module and wait a while before putting it back on.

5. Cover the cover plate according to the disassembly method and install the battery. 6. Turn on the power button and try again, it will generally solve the problem.

You can do this: unplug the external power supply, remove the battery, turn it on, and then connect the external power supply, turn it on, and see if it can start normally, otherwise you have to send it to the repair station.

There are many reasons why the computer can't be turned on and the screen doesn't respond, one, the system is damaged, the hard disk is damaged, the notebook can't recognize the hard disk, etc., second, the memory is broken or the memory slot is soldered, and then there is a problem with the motherboard power supply chip, and third, the BGA (north-south bridge, graphics card, network card, etc.) packaging chip virtual soldering damage will cause the boot screen to not light up. It is recommended that you send it for repair and testing.

I'll help you in Beijing.

If you are not in Beijing, it is recommended that you find a reputable and skilled repairer to help you overhaul.

If you use safe mode to enter, if it doesn't work, it's a memory problem, see if it's loose. Erase those golden fingers with an eraser.

Try to reinstall the system It may be that the system files are missing, and the computer can't be turned on, I have had this situation, and finally it is solved by reinstalling the system.

Oh, you see, you wiring it, the contact is poor, and the screen cable may not be connected properly.

Is the hard drive light on. Is there a flicker? It could be a software issue. Have you added the memory, if so, unplug the memory you added, and then turn it on.

If it really doesn't work, just send it for repair. I can't see your machine, I can't help it.

Hello! After my analysis, I came to the following conclusions:

1.I don't know if you bought a new memory module and plugged it in, if both memory modules are the original memory of the computer, this situation will not occur.

2.If, as I said, your other memory module is indeed newly bought, then pay attention to ensure that the frequency of your new memory module and the original memory module must be the same, otherwise there will be a black screen phenomenon, you can remove the two memory modules to see if they are the same.

3.If the frequency is the same, but there is a black screen phenomenon, then you can see if the two memory sticks are the same, because sometimes the brands are different, even if the frequency is the same, there will be a phenomenon that the machine cannot be turned on, but this situation is rare.

Hope it helps!!

Power-on no display fault, mostly caused by loose components or chip virtual soldering damage, you need professional maintenance personnel to help you detect and try to repair, common reasons: loose memory or memory itself has a problem, reinsert the memory or change the memory to try; The power supply chip of the motherboard is soldered or aged, the screen cable is loose or the motherboard short-circuits the power supply circuit of the screen; Graphics card, south bridge, north bridge BGA packaging chip virtual soldering or damage, generally there are more virtual soldering, just add soldering. Judging by the maintenance experience, I hope it can help you.

In response to the above phenomenon, I deal with it like this: wipe the memory module with alcohol to dry, blow the slot (special tool) to remove the dust, and then insert two memory sticks, which can generally be turned on normally (because there are two memory sticks in use, indicating that they are compatible). Good luck!

Try to change the memory, sometimes the two memories cannot be used at the same time, most of them are due to memory compatibility problems.

That is, the two memories are incompatible with each other and out of sync. If the steps are not in tune, it will be messed up.

It's likely that you have two memories and the frequency is the same.

Dear Lenovo users, hello!

Dear Lenovo users, hello!

You can try electrostatic discharge: after shutting down, remove the power cord, mouse cable light external device cable, and remove the power supply, press and hold the power button for 5 seconds, repeat 3 to 5 times. If this does not work, it is recommended that you send it to our service station for resolution.

Provide you with the inquiry link of the service station, the normal working hours of the service station are Monday to Friday 8:30-17:30 (except for statutory holidays, some service stations will be marked on duty on Saturdays and Sundays).

In this case, the solution is:

1. Take out the battery of the motherboard, buckle it back, and discharge.

Purpose: To restore the default values of the BIOS settings and eliminate the automatic reboot or shutdown of the BIOS cooling presets.

2. Clean the dust in the chassis to eliminate the short circuit or poor heat dissipation of the motherboard caused by too much dust.

3. See if the CPU thermal grease is dry, silicone grease is used to improve heat dissipation ability, if there is no silicone grease, the heat may not be dissipated, and the machine will automatically shut down.