User`s manual

HDM 5049 PLUS Operation And Adjustment
Page 4-7
Press to return to the Color menu, correct the problem and restart alignment.
After alignment is finished, the HDM 5049 PLUS displays following message:
Press to return to the Color menu.
If alignment failed, the HDM 5049 PLUS displays following message:
Press to return to the Color menu. The old alignment values are restored.
An alignment can fail due to following reasons:
The Thoma has not been adjusted for offset (see procedure above).
Too much ambient light.
Incorrect 100% White Field connected to the monitor.