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Disconnect all connected devices except the mouse, keyboard, and monitor. This includes removing USB flash drives and memory cards from card reader slots. 2nd,3rd links may be helpful, HP troubleshooting Computer Does Not Start and Computer Does Not Start and Emits an LED or Beep Code. I hope this helped you out, if so let me know by pressing the helpful button.
If the power light comes on, the monitor has power, skip to Check for fan noises, beeps, and power lights. Disconnect the video cable from the monitor and make sure the monitor power cable is plugged into a power outlet.
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It’s possible some data on the drive is corrupt, preventing Windows from booting properly. Thankfully, Microsoft has a few tools that can attempt to fix the problem.
If all else fails and you don’t have a backup, take your hard drive out of your computer, connect it to a USB adapter, dock, or enclosure, and plug it into another known working PC. Sometimes your Windows installation is fine, but the bootloader—the data that governs Windows’ boot process—is corrupted.
- If you’ve been able to log in, the black screen could be something as simple as an app that froze during startup.
- If it’s faulty or has come loose from its connection, this may cause a Mac to suffer a kernel panic.
- As with Windows, restarting from a Mac’s recovery partition may be useful in the troubleshooting process.
- If you suspect a hardware issue, check your computer’s random-access memory, or RAM.
- If you have the problem after booting from the recovery partition or an external boot disk, that suggests the concern is with your computer’s hardware.
If the LED light on the power supply is not lit, then it may be bad.To verify, use a known working external power supply from another machine of the same model, if possible. Unplug the power supply from the electrical outlet, followed by the DC connection from the back of the PC. The first thing to check is that your monitor is plugged in and turned on.
Make sure that it is connected properly and the connecting screws are tight. Turn the monitor off and then Speccy back on again to see if an image is displayed. If you see the initial HP logo screen but later lose the picture, go to Connect the computer to another monitor. If a message is displayed, the monitor panel is working and the problem is related to the video signal. For further troubleshooting steps, see, Flat Panel Monitor Displays Message about No Signal, Signal out of Range, Sleep, or Power Save.
After you have reconnected the power cord, turn on the monitor to see if an image is displayed. If there is still no image, continue to the next step. Make sure that you have the monitor power adapter cord plugged into the power connector. Otherwise, check the video cable connection on the back of the computer and on the monitor.
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At first setup, or under certain signal conditions, the monitor might not be able to switch to a new display resolution. If you need instructions for resetting your monitor, search the HP support website. Go to HP Customer Support, and follow the instructions to find your product. If you do not hear noise from the fans and the power lights on the computer are not on, the problem is related to the computer, not the monitor. To troubleshoot a computer that does not start, see Computer Does Not Start.