HP notebook has a black screen, and the system can start normally. An external monitor is connected, and the desktop can be seen from the monitor, but the notebook is bright gray.

According to your description, I suggest you refer to the following information:

If your external monitor can display the desktop, your problem is related to the monitor. I suggest you contact the maintenance center to check the hardware.

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..