And after thinking, I don't find the reason why it could work: the USB Hub is powered by the external plug (fine), the USB keyboard and mouse are connected to it (fine), but the USB Hub is plugged into the computer with a USB cable. The guy provides a solution to use a USB Hub with external power supply, I tried but it's not working. When performing a hard reset please note remove any and all USB devices, and remove memory cards from the card reader slot. I have read your thread on your HP Notebook and getting a blank or black screen on startup. Nothing available in the BIOS to enable it, I've found this topic by the way: Hi Alestein, Thank you for visiting the HP Support Forums and Welcome.
I have a DELL Inspiron 15R 5537 which has the particularity to power off USB port when the lid is closed and the computer put to sleep.which is SO annoying to wake it up, as I use the laptop with an external screen/keyboard/mouse.
