Frontier 370 Missing red

[anna]

I have an old frontier 370, color red is missing, I changed the laser, changed all IOMs and the mother board and no difference in my print. I also swapped the cables red with green. Does anyone has any ideas what else can be wrong? 

[Minilab service]

On your test print is missing Magenta ( not Red ) . Magenta on paper makes Green laser head. Open exposure check menu and look Green laser head works there, or not.