As though the red of the colour wheel has gone dark with age. Instead of
vibrant red it is dull red/brown. Improved a bit with up to the limits
changes to the colour matrix, now dull red rather than dark brown for a
saturated red input . Not a leads problem , computer in and then computer
out to a monitor is fine. Video source is similarly affected. No loose leads
inside. "Service" manual has no schematic of course.
Is there a generic cause to this as it seems quite common across different
makes and models?