Which model? Morphy Richards made a lot of different blenders over the years.
These may help:
https://www.youtube.com/watch?v=VrzPdgDJ_js
https://howtomendit.com/answers.php?id=252008
You may get some mileage by doing a G**gle search for - say - "Morphy Richards blender light flashing"
acp
July 2018