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Dear Lenovo users, hello!
Your situation recommends the use of electrostatic discharge:
Notebook: (removable battery).
Unplug all external devices (including power cords and batteries) from the host, press and hold the power button for 30 seconds, and then connect all external devices to power on for testing.
Notebook (non-removable battery):
If your laptop has a built-in battery, there will be a reset hole, use a straightened paper clip to insert into the reset hole, press it for a few seconds, and turn it on for testing.
The above method can see if it can be turned on, if it can't be turned on, it must be a hardware problem, generally a problem with the screen or screen cable.
If your problem is not solved, you can complain, put forward your valuable opinions, and then transfer to manual service.
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There may be static electricity, try to remove the battery, remove the adapter, press and hold the power switch when the power is not on, and plug it in after 20 seconds.
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If the memory module is broken, just replace it.
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Hello friends:
The reasons and solutions for the display of no signal after the desktop is turned on are as follows:
The first reason: it is possible that the connection between the desktop host and the monitor is not in good contact (especially the interface is not plugged in or loose), and there may be a problem with the data cable of this connection, so there will be no signal input to the screen, no slamming display, black screen.
Solution: Just plug in the connected cable again, or replace the cable.
The second reason: due to the cheat in memory or discrete graphics card.
An oxide layer is formed on the surface, which causes poor contact between the memory and the memory slot, and the poor contact between the graphics card and the graphics card slot, resulting in a black screen and no signal output
Solution: You can turn off the power first, open the compartment, dial out the memory, use the eraser to the part of the gold finger (that is, where there is a copper sheet,) wipe back and forth a few times, and then insert back into the memory slot (or insert it back into a memory slot), it's OK, if there is an independent graphics card, you can also use the same method to deal with the graphics card, and then insert it back into the graphics card slot, and finally install the machine, restart the computer, (take the memory ** as follows:)
The third reason is the video memory of the graphics card.
If there is a virtual soldering, the performance of the main chip decreases, the BIOS of the graphics card is disordered, and there is a problem with the control power IC, the graphics card will not work normally, that is, the graphics card is broken, and naturally the computer will have no signal output, and it will not be able to display Tongqing, and the screen will be black when it is turned on.
The fourth reason: there is a problem with the boot circuit of the motherboard, such as clock, reset, CPU power supply, and MOS tube.
and so on, there is a virtual welding failure, which may cause the failure to turn on, as well as the problem of virtual welding in the south bridge, etc., there will often be no ability to turn on, the display can not receive the signal, and there is no signal, etc., the treatment method: is to repair the motherboard, (if in the warranty period and after-sales service).
Hope it helps you and I wish you happiness
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