New Desktop Black Screen

I bought a new desktop but kept my older monitor. When I press the On button, it turns the computer on but the screen remains black. At first, I tried to disconnect/connect the hdmi cable and the login screen appears. But this has been happening more frequently and now the login screen blinks but then disappears again. I had then removed the plug from the computer and pressed the on button for 30s. Turned it back on and the screen worked fine. This kept happening until it didn't work anymore. My monitor is a HPw2558hc and my desktop was a Dell. With that happening, I've returned the desktop and bought another one, HP Pavilion 510-p136. And it's happening again. I had just got in by turning all computer off and on again, but I know the problem is still there and very soon I won't be able to access my screen again. What is wrong? Thanks!!!
Reply to givemesomelight
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More about desktop black screen
  1. Have you tried connectimg to other ports such as vga,dvi if your video card or monitor supports it? Just to check if it is the hdmi port or the hdmi cable.
    Reply to darth.gabby
  2. darth.gabby said:
    Have you tried connectimg to other ports such as vga,dvi if your video card or monitor supports it? Just to check if it is the hdmi port or the hdmi cable.


    NO, I haven't, I don't have these cables. It has 2 hdmi ports and I've tried both. But when I connect the monitor to my older desktop, using the same cable, it works fine.
    Reply to givemesomelight
  3. Are you using a graphics card? If yes, you can try connecting the hdmi port on your motherboard to test. Is this a new computer? Have you tried cleaning the hdmi port on your computer? Some dust build up or condensation might be the cause of this.
    Reply to darth.gabby
  4. darth.gabby said:
    Are you using a graphics card? If yes, you can try connecting the hdmi port on your motherboard to test. Is this a new computer? Have you tried cleaning the hdmi port on your computer? Some dust build up or condensation might be the cause of this.


    I am not using a graphics card. Just using the computer for office package and internet browser. Yes, computer is brand new (1 month of use) as well as the other one I've acquired and showed the same problem. I did not install any software on it besides office, windows 10 (came with it) and a canon printer. My hdmi cable is from 2007, when I got my monitor. Could this be a problem?
    Reply to givemesomelight
  5. You have 2 brand new desktop computers.
    -tried both computer on the hp monitor (failed)

    And the HP monitor is already 10 years old.
    It's probably the monitor itself.

    Problem 1: a loose connection or a bad capacitor insode the hp monitor.
    Problem 2: the monitor backlight is failing. You can check this by switching your computer on and when the screen goes off, use a led flashlight or any powerful flashlight you have and see if you can see visuals on the monitor screen.

    I have encountered a faulty monitor before and it just needs new capacitors
    Also encountered the led/lcd backlight going bad, and causing a black screen. (Due to the lack of backlight).

    It's a 10 year old monitor, this is common. The repair shop can still fix it.
    If not, then a brand new monitor would fix the problem.

    PS: I also had my mainboard retired after 7 years of service. :)
    My Asus LCD monitor also had this problem (used for 5 years)

    Hope this helps. Hope you update if the problem has been fixed.
    Reply to darth.gabby
  6. givemesomelight said:
    I bought a new desktop but kept my older monitor. When I press the On button, it turns the computer on but the screen remains black. At first, I tried to disconnect/connect the hdmi cable and the login screen appears. But this has been happening more frequently and now the login screen blinks but then disappears again. I had then removed the plug from the computer and pressed the on button for 30s. Turned it back on and the screen worked fine. This kept happening until it didn't work anymore. My monitor is a HPw2558hc and my desktop was a Dell. With that happening, I've returned the desktop and bought another one, HP Pavilion 510-p136. And it's happening again. I had just got in by turning all computer off and on again, but I know the problem is still there and very soon I won't be able to access my screen again. What is wrong? Thanks!!!


    So today I got a dvi to vga cable and it worked! Problema solved! ;)
    Reply to givemesomelight
  7. Nice to hear that. Probably a bad hdmi/dvi port problem. Connecting to the good VGA port fixed the problem.

    Kindly mark this thread/topic as "solved"

    Thank you.
    Reply to darth.gabby
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