after a month wait on a replacement Gotek Unit, went to wire it in as external drive and saw the display "Sleep" (i had the amiga copy the WB Disk i dont want to put much wear on my original WB1.2 Disk)
But no smell no sound no smoke no appearance if the tube popped, but it has a glitter effect in just behind the glass, (mind teh glare used my iphone)

Where abouts are you? Someone local may have a look at it or know of someone or some company/repair shop who can have a look at it for you.