Dyson DC28 on/off switch and med pile light flashing?

http://www.fixya.com/support/t13805659-pile_light_blinking_dc28

Manual here:
http://www.manualslib.com/manual/41624/Dyson-Dc28.html?page=8

Based on the diagnostics table and your abbreviated description, you have a red power light and one white light blinking:

One white button flashing with red on/off button: Indicates an obstruction. Please refer to the 'Clearing brush bar
obstructions' section.

XXX
August 2016