hardware failure - Laptop only displays on external monitor, even after screen was replaced

08
2014-07
  • breem

    I have an HP Pavilion G6. The screen (LED) doesn't work, but it displays fine on an external monitor with HDMI or VGA. The screen was obviously cracked so I got a new one. After replacing it, the screen was still black, so I replaced the monitor cable. Still nothing.

    There's nothing at all on the screen, even when shining a light behind it. I'm assuming it can't be the GPU since it's displaying fine externally.

    Any ideas what the problem could be?

    • Answers
    Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook.

    Related Question

    HP Laptop - Black screen when turned on everything else is working
  • anujprashar

    I have HP Pavilion DV4T-2100 model running windows 7. Today when I turn it on I got black screen and it is not showing anything at all. Everything else is working. I can hear fan noise, LEDs lights are blinking and even I can hear window welcome tone when window starts and also as I know my first screen is password screen when that tone is played I type password and press enter and I can hear sound that is played when user login inside system. Only thing that is missing is display as screen is completely black all time. I have done removing battery and pressing power button for 30-60 seconds many times but no success. The screen is remain black all time. Please tell me what is the problem. Is there any defect with hardware or I have to replace anything.

    Edit: When connected to external monitor display is showing up but when display is switched to laptop it does not shows up anything it remains black(not completely black but bright black screen). Is there a fault with laptop screen or wire that connects with screen to other part. What is possible fault if it is working with external monitor.

    Edit no. 2: Got it checked from a technician and he told me that it is motherboard fault and it needs to be replaced. Is he right about it? Please share your experience if you have replaced same problem.

    Thanks in advance.

    Regards, Anuj


    • Related Answers
  • mdeitrick

    I had this same issue when I was working with a client's laptop about a week ago. The problem was that one of the wires behind the screen was being pinched, hence cutting off the signal. Worst case scenario, you may have to replace your screen.

  • slhck

    There is an IC for display also called "display chip" which gets exhausted.

    There are 2 solutions:

    1. There is a technique called "reballing" which needs to be done on that chip, basically it's a kind of soldering of the chip.
    2. You can change the chip.
  • Indrek

    First thing, try to replace the inverter. If nothing works after that, then change the cable that connects the motherboad and the display. As a last resort, if nothing else works, change the entire display.