pressing power button turns on keyboard light but nothing show on screenbr br hp laptop power led blinking continuously no displaybr br hp laptop power and keyboard light blinking continuouslybr br hp 820 laptop power button light blinkingbr br hp laptop caps lock blinkingbr br hp elitebook 820 g1 caps lock blinkingbr br #hp #elitebook #820 #g1 #power #button #keyboard #light #blinking #continously #nopower #nodisplay