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Computer boot  display no signal keyboard light is off

Asked by: Kenneth Hughes 252 views Computer July 27, 2018

The computer is turned on  The display has no signal. The keyboard light is off. The fan in the main unit is rotating. The memory has been cleaned

13 Answers

  1. +6Votes  

    The keyboard light is not on after the computer is turned on, and there is no image signal on the display. There are two problems:

    1, it is a hardware problem, as the upstairs says, it may be bad contact. . However, this can be seen, if it can not be used, look at the keyboard and mouse and the chassis is not connected. If it is really bad, you can repair it yourself, you can only change it.

    2. It may be that a certain software in the system conflicts with the keyboard and mouse at work. I have encountered the phenomenon of using a USB keyboard with a blue screen. Just connect this keyboard and mouse and reinstall the system.

    Expanding data:

    There is no signal solution for computer monitors:

    1. For the no-signal situation of the computer monitor, we first need to check the monitor data. Whether the line is connected or not, to see if there is a problem with the connection. If the computer is a stand-alone platform, the data cable should be connected to the video output interface of the graphics card, not the video signal output interface of the motherboard.

    2. The common cause of no signal on the computer monitor is the lack of signal caused by the looseness of the computer memory or too much dust. In this case, the memory strip of the computer needs to be dusted and wiped clean with a paper towel. The gold finger of the memory stick is then installed back to check if the computer monitor has a signal.

    3, if you are using a discrete graphics card. It is also possible that the above situation will occur. At this time, it is also necessary to reinstall the graphics card to solve the problem of no signal on the computer. For the computer to boot without display but there is an alarm, you need to check the faulty device according to the BIOS alarm sound.

    4. If the memory or graphics card is damaged due to data cable damage or data pin breakage, you need to find a professional computer repair technician or return to the factory for repair and processing. Do not disassemble the monitor or the host.

    Michael- July 28, 2018 |

  2. +7Votes  

    If you have confirmed that the memory is ok, check the motherboard and power supply for any components that have been burned.

    Martha Young- July 28, 2018 |

  3. +6Votes  

    In general, the memory is not plugged in, you can try to insert it several times, or it may not be possible.

    Henry Moore- July 28, 2018 |

  4. +4Votes  

      If the signal keyboard light is off, it means that your computer host is not turned on. If you have confirmed that the memory is ok, check whether the motherboard and the power supply are burnt.

    Michelle- July 28, 2018 |

  5. +6Votes  

    The motherboard or power supply is broken. Try to use a power supply first. If there is no replaceable power supply or motherboard, only the repair test is sent.

    Betty Hill- July 29, 2018 |

  6. +1Votes  

    Exclusion method, memory, CPU, graphics card, power supply one by one replacement.

    Janet Green- July 30, 2018 |

  7. +4Votes  

    The problem of memory sticks is mostly.

    Douglas Roberts- July 30, 2018 |

  8. +8Votes  

    Check if the keyboard cable is connected to the computer, and there is no connection between the monitor and the computer.

    Rebecca Davies- July 30, 2018 |

  9. +6Votes  

    Bright machine hemp, most of them are video card

    Williams- July 31, 2018 |

  10. +2Votes  

    Memory stick contact problem, unplug the gold finger with a soft cloth.

    Jason Harrison- July 31, 2018 |

  11. +4Votes  

    should be the memory bar is not good contact, it is recommended to power off, and then re-plug the memory bar

    Taylor- August 1, 2018 |

  12. +4Votes  

    first use other computers to determine the monitor and keyboard intact, and then check the problem of the machine.

    Pamela Thompson- August 1, 2018 |

  13. +7Votes  

    If you try to unplug your hard drive, you may have a problem with the motherboard.

    Brian Wilson- August 2, 2018 |