I've just installed a new monitor - pretty much the same as the old one. CC was working fine on the old monitor but on the new one files opened in both Lightroom and Photoshop are very dark. I also see, briefly, a yellow triangle in the image when it opens. Are there setttings I need to change?
Are you using any sort of screen calibration? If you are, did you disable it before attaching the new monitor?
What operating system are you using?
Thanks. I fixed my problem - I changed the colour space option in Windows 8.1.