I blew my multi meter a few weeks ago and am confident using one , but i also remember when i removed the cover of the black box VFD to take photos to post i un plugged it from the mains supply but there was a red neon light flashing on the BOB even though there was no power lead connected and even after 30 minutes it was still flashing so i am now asking myself in the name of safety should i just write to the company and say replace the box as there is an issue of a thousand pounds exchanging hands. your thoughts would be appreciated on this