Greetings Brainydanny,
The bright green noise you are seeing in your viewfinder or on your monitor is most likely the Focus Peaking feature, which is a helpful manual focus aid rather than a defect in the camera's sensor. Peaking works by highlighting the sharpest areas of your image with a high-contrast color—often bright green—so you can easily see exactly what is in focus while in recording mode. This highlight does not appear on your actual recorded footage; it is simply a visual guide for the operator that disappears when you switch out of the recording or standby screens.
To turn this off or change the color, navigate to the Assistance Functions menu (usually indicated by a small screen icon) and locate the Peaking setting. You can toggle it to "Off" to clear your display entirely or adjust the "Select" option if you prefer a different color like red or white. If the green noise persists even after turning Peaking off, it may be worth checking your Black Balance by selecting "ABB" in the menu with the body cap on to recalibrate the sensor.
