HP Notebook Press the Power on key after light, but the screen is always black, only the CAPS LOCK key flashes, Flash 3 times a loop, listen to the fan

Phenomenon:

HP Notebook Press the Power on key after the lights, but the screen is always black, only the CAPS LOCK key flashes, flash 3 times a cycle, listen to the fan rotation sound, hot air, CPU should also be working, ask what is the problem.

Solve (I follow the red to do it, it is really strange ...) ):

Hello, thank you for choosing HP products.

1, your notebook turn on the black screen, please recall whether there have been any special operations recently, such as whether the recent hardware changes (such as the addition of new memory) or connected external devices, if so, we recommend that you restore the previous hardware configuration and disconnect all external devices to see if the normal boot.

2, if you do not have a special operation, the use of battery or power supply adapter can not power on, it is recommended that you put the machine to static test, the method is as follows:

(1) You take the laptop battery and the power adapter down, press and hold the boot button for 10 seconds, or a continuous click on the power button 10 times or so, you can release static electricity, and then connect the adapter test can be properly switched on.

(2) Note: If the battery of this notebook is not easy to remove, then please do not connect the external power adapter, the static installation of the machine for about 30 minutes to complete the electrostatic discharge process.

3, if the problem is still, the initial judgment of the situation may be due to hardware failure such as screen failure, motherboard failure or poor line contact and other causes. In order not to delay your use, it is recommended that you contact your local HP Gold Service Center to detect the specific cause and then process it.

You can find the nearest HP Gold Service center from the following URL: http://stg.www8.hp.com/cn/zh/support-drivers/esupport/ascpps.html

HP Notebook Press the Power on key after light, but the screen is always black, only the CAPS LOCK key flashes, Flash 3 times a loop, listen to the fan