ND is black - All other displays working

[argileh]

Today I am having a strange issue. For some reason, the CS ND is black while all other displays (CS PFD, FO PFD and ND, EWD, SD) are showing graphics

i run all six displays on a remote PC. The ND shows as connected to Server, same as all other displays.

Any idea what's happening. This suddenly happened

thanks

ibrahim

[argileh]

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