Understanding HP Notebook PC Light and Beep Codes.. This condition indicates that the Embedded Controller/Keyboard Controller policy requires you to type a key sequence. Reset the embedded controller.. The battery power light that is off or blinking indicates the condition of the power supply.. No response to mouse/keyboard. 2. After about one minute I've decided to turn it off by pressing power button for a few seconds. The laptop has turned off. 3. The next turn on - black screen, and the only reaction is a cyclic blinking backlight of the keyboard and status leds in some repetitive manner: [content removed] 4.
Click Driver-Keyboard, Mouse and Input Devices, and then select the HP Wireless Button Driver or HP Hotkey Support driver, depending on your operating system and notebook model. Download and install the driver.. Print Share Feedback This document pertains to HP Notebook PCs with the HP Unified Extensible Firmware Interface (UEFI) beginning in late-2008. On startup, you may see a blank screen. If the diagnostic utilities detect a specific problem with hardware components, the fan turns on, but the screen remains blank. To help identify the cause of…