Light source errors

Tht message means that either D2 or halogen lamp, is faulty. Halogen lamp you can check through slits on the back of the instrument. It should be visibly lit.

Through those slits, you`ll also see if the D2 lamp is lit. Use glasses.

Whichever lamp is not lit is faulty, so replace it, as described in the manual.

If that does not help, then you`ll need to call a service engineer. Something else is then wrong with the instrument.

Best of luck.