If a video issue persists after the initial checks, which of the following should you check next?

When dealing with video issues on a computer, checking the inverter board is a critical step, especially if the initial basic checks do not resolve the problem. The inverter board is responsible for supplying power to the display's backlight in LCD screens. If the backlight is not functioning properly, it can cause the screen to appear very dim or cause complete failure to display an image, even if the other components (like the motherboard or GPU) are working correctly.

In scenarios where video issues persist, the inverter board is a prime suspect in cases of visible display failures related to brightness. Addressing this component can help determine if the lack of display is due to insufficient power reaching the backlight or if there are other underlying issues within the screen assembly itself.

While other components like the primary battery, RAM modules, and external monitor are important to consider in troubleshooting videos or display issues, the inverter board directly affects the lifespan and functionality of the laptop or monitor's display, making it a logical next step in the troubleshooting process. The external monitor option could be valuable in diagnosing issues isolated to the laptop itself but does not address internal components that may require attention.