Sparks visible thru vent slots of BV4000 Type 4 Blower

There is an adapter to a different type of bag or other.

https://www.ebay.com/itm/BLACK-DECKER-Leaf-Collection-System-Attachment-Vacuum-Blower-Replacement-Bag/113197217333?hash=item1a5b147635:g:ME0AAOSwjjRbb~-m

https://www.ebay.com/itm/BLACK-DECKER-Leaf-Collection-System-Attachment-Vacuum-Blower-Replacement-Bag/264134518058?hash=item3d7fa4e52a:g:iNoAAOSwAx9cOpb6

Same thing here after i did my neigbours yard!!!! i found out it was the switch the latch that moves it wont I am trying to work a away round it hope this helps

check fuse to blower motor under dash you may have a bad blower motor

Open the bottom vent where the air comes in...there should be a locking clip there that when depressed with a screw driver will allow it to open...Install the vacuum tube in the opening made by opening the vented bottom...then remove the plastic blower tube and install a collection bag on the outlet where the tube was.
Please vote on this solution.

first check your sparks plug, if it was never replaced it needs it. next check your air filter, if its clogged and dirty it needs cleaning. let me know if you have any questions about my answer or if these arent the problems, thanks

I have this unit. Mine stopped working today after being warm on the handle the last few uses. I opened the unit up (torx 15) and smelled, then found that a fused wire coming off the motor had burned/melted/separated at a plastic plug right inside the handle. I'm not sure if it had anything to do with it, but in this same compartment of the handle there was an anti-theft strip floating around. I called BandD and they said the BV4000 type ONE has been recalled. http://www.cpsc.gov/cpscpub/prerel/prhtml07/07005.html

There are only a few parts to check on this unit. After you have done that,
throw it away and buy you another unit. The cost of parts and labor exceed having the unit fixed.

turn your blower upside down, there should be a slot with a metal thing in it. Stick a Flat head screwdriver in the slot, and push forward or back on the screwdriver, that should open the door on the bottom. Attach your bigger tubes to the bottom of the unit, and the bag on the plower part, and there's your vacuum.

I posted this solution on another similar thread, but it may pertain here.
I have this unit. Mine stopped working today after being warm on the handle the last few uses. I opened the unit up (torx 15) and smelled, then found that a fused wire coming off the motor had burned/melted/separated at a plastic plug right inside the handle. I'm not sure if it had anything to do with it, but in this same compartment of the handle there was an anti-theft strip floating around. I called BandD and they said the BV4000 type ONE has been recalled. http://www.cpsc.gov/cpscpub/prerel/prhtml07/07005.html

Black and Decker has issued a recall notice for Type 1 BV4000 because "a loose connection between the unit and an extension cord can create heat, posing a possible fire hazard" Says to STOP USING and call 1-866-853-2138 to arrange for free repair. (Found info by Googling "Black and Decker Leafhog", navigate to Black and Decker website and click "Important Safety Recalls" button at bottom of page.)