At the beginning of an exposure, ColorFast performs an automatic test, the AutoLuma test, to determine if the luminance of its internal CRT is correct. If the AutoLuma test fails, it could mean that the unit has not warmed up, is operating in a very cold temperature, or is in need of repair. Wait a few minutes for the unit to warm up and make sure you are operating within the proper temperature range. If the AutoLuma test continues to fail, you should have the unit repaired. In the meantime, you can force ColorFast to ignore the AutoLuma failure and expose images anyway by selecting the ΓÇ£Ignore AutoLuma ErrorsΓÇ¥ item. AutoLuma errors are being ignored if a checkmark appears next to the ΓÇ£Ignore AutoLuma ErrorsΓÇ¥ item in the menu. Once selected from the GCC Print Manager, ColorFast will ignore all subsequent AutoLuma test failures until the ΓÇ£Ignore AutoLuma ErrorsΓÇ¥ item is deselected.