Transparent checkerboard missing - replaced with dark grey??

[Todd_Morgan]

Where did my transparent checkerboard bg go? I have it selected to be on, but it's dark gray???

[Ged_Traynor]

@Todd_Morgan can you post a screenshot of the Photoshop interface with all the pertinent panels opened to highlight the issue

[Kevin Stohlmeyer]

@Todd_Morgan check your preferences/transparency and gamut settings.