HP z2100 odd colour problem

Hi Guys,

bit of a weird one may be some one has come across this before,

i have a hpz2100 which has been working fine for years,

I have noticed colours were looking a little off to what i was seeing on screen an decided to look further into it,

if i print a swatch of CMYK , all looks fine on screen however the print outputs cyan as a completly different blue more of a sky blue than cyan

however when i print the test pages from the front panel of the machine, perfect colours cyan and light cyan are exactly right

i have tried different papers, removing and reinstalling the driver in case it was corrupt with no change what so ever,

same happens from Indesign PDF or photoshop

Any ideas ?

Many thanks