Hi @audiq3 ,
Here is a link from the Dyson DC56 [https://www.dyson.com/support/dc56/dc56-dyson-hard/my-machine-is-not-working/machine-wont-switch-on-mb-lights-check-dc56/solid-light-power-check-dc56/working-ok-charge-machine-dc56/cutting-out-in-use/cutting-out-in-use-pulsating-noise-check-dc56/pulsating-noise-check-for-blockages-dc56/not-resolved-blockage-checks-dc56|troubleshooting guide] that describes what to check when you experience the problem that you are having.