laptop - Lenovo B575 Display Not Working - LCD Cable and Display Have Been Changed

06
2014-04
  • Pete

    I am having a problem with the display on a Lenovo B575. When the computer is powered on, the display is black, no signs of color. It works without a problem when connected to an HDMI monitor. I changed the display, but the problem remained. I then changed the lcd video cable. But it still only works on the external display. When I changed the video cable, I noticed that when it comes out of the motherboard it also connects to the camera just above the display. The cord splits, with one end going to the display and the other to the camera. I then downloaded a Lenovo camera app, and to my surprise the camera works. Any help with possible solutions or suggestions would be great. Thanks.

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  • TrueWill

    I recently purchased a new computer and a new flat-panel monitor from Dell. Everything worked perfectly if I used the supplied analog monitor cable. Since both the monitor and the graphics card supported HDMI, I purchased a 6' Dynex HDMI cable and connected that (disconnecting the analog cable, and with the system turned off).

    Everything worked fine at first - it auto-detected the change. After a few minutes I noticed the screen would go black for a second or so, then come back on. These dropouts kept happening. Reconnecting and rebooting made no difference. I switched back to analog, and it's been working perfectly.

    What are the most likely causes of this, and how can I diagnose the problem?

    Details:

    • Display adapter: ATI Radeon HD 3450 256MB
    • Monitor: Dell ST2210 Widescreen Flat Panel (1920 x 1080)
    • Cable: Dynex (Best Buy) 6 foot HDMI digital A/V
    • Computer: Dell Inspiron, Intel Core 2 Duo
    • OS: Windows 7 Ultimate 64-bit

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  • harrymc

    The problem can be hardware, software or firmware. Too many causes are possible to analyze it like that.

    Try to ensure that you have the latest drivers from the Dell support site. You may also try another HDMI cable, just in case.

    But if the problem persists, and since this is a new computer, you're entitled to ask Dell Support for a solution.

  • MDMarra

    It could be a driver issue. There have been a lot of flakey HDMI issues with older drivers. Try getting the latest direct from ATI.com