According to your description, I suggest you refer to the following information:
1. Your laptop turns on a black screen, and the screen doesn't light up as if it wasn't turned on. Please recall what you did before this happened, such as whether you made any changes to your hardware recently (such as adding new memory) or connected external devices. If so, I suggest you restore the previous hardware configuration and disconnect all external devices to see if they can be turned on normally.
2. Please use the battery or power adapter alone to power the notebook to see if it can be turned on normally.
3. If you haven't done anything special, you can't start the machine by using the battery or the power adapter alone. I suggest you try to turn it off and let the machine stand. The method is as follows:
(1) Remove the power adapter, battery and other external devices, such as USB mouse.
(2) In the absence of power supply equipment, you press and hold the power-on key for about 1 minute;
(3) Then don't connect the power equipment, and let it stand for about 30 minutes;
(4) Don't plug in the battery after standing, just use an external power supply, connect the machine end of the power supply first, and then connect the socket to see if it can be turned on.
4. If none of the above methods can solve your problem, it is preliminarily judged that this situation may be caused by motherboard failure or poor cable contact. In order not to delay your use, please contact your local HP Gold Service Center for testing and handling.
You can check the nearest HP Gold Service Center through the following website:
/zh/support-drivers/e support/as CPPS . html
I hope the above reply can help you.
If the above information can't solve your problem, you can log on to www.hp.com.cn/chat,, the online chat room of HP Network, and ask an online engineer to help you solve the problem further. More product information is available in www.hp.com.cn/800..