What resolution is UXGA?

You are looking to purchase a new laptop computer, and the specifications of the laptop’s LCD display are for a UXGA resolution. What are the dimensions in pixels of UXGA resolution?

Troubleshooting a Laptop LCD Display

You’ve powered on a laptop, but the LCD screen isn’t displaying any video. The laptop’s lights are working and you can hear the fan and hard drive running. Which of these options would be appropriate troubleshooting steps?