There may be something caught in the area around your key that is making it stick. Use compressed air to spray the area around the key to dislodge any particles trapped in there. If this problem is regularly occurring, you can purchase a keyboard cover in stores or online. http://www.ebay.com/bhp/hp-keyboard-cover If there isn't anything caught in the keyboard, the spring beneath the key that causes it to pop back up after being pressed may be worn out, or be missing entirely. HP Stream 11-d020nr Troubleshooting

If you're having trouble with your screen's brightness, use the function keys F2 and F3. The F3 key will be the one to raise the brightness, so press the F3 key until you reach your desired brightness. If this doesn't work, check to see that the F3 key is working by pressing F3 while holding down the FN key. if a search menu appears, then the F3 key is working and the problem may be the screen itself. HP Stream 11-d020nr Troubleshooting

First, check to see that the battery is charged. If it's not, plug in the power adapter and try to turn the laptop on again. It should light right up. If your laptop still does not turn on after plugging in the power adapter, then you may have either a broken charger, or bad battery. Both of these can be purchased at your local electronics store. HP Stream 11-d020nr Troubleshooting