a good place to start is the g2 ( screen grid) set up
turn bright and contrast to min
adjust screen grid ( lower shaft on ihvt ) to the point a hint of video appears on screen
then adjust contrast / brightness to desired levels
for chroma balance " greyscale or white balance "... as Peale stated .
note the bottom starcase should run from white to blk, and it should not be tinted r, g or b
qrz