Electric black and decker 14 grass hog won't start

Question edited for full 'make model (what it is)'.

Nothing makes me think it has an internal fuse.

https://www.jackssmallengines.com/jacks-parts-lookup/manufacturer/black-decker/grass-trimmer/gh900-type-2/grass-trimmer

and also

https://www.google.com/search?q=gh900+trimmer+replace+fuse

..

http://www.kmart.com/black-decker-side-discharge-grass-bag/p-9990000032185411P Try here.

They have upgraded the old string heads (type 1) to a new string head (type 2). They say type 1 is no longer available. Please see part numbers 20 & 21 in this 14" Grass Hog parts breakdown diagram. The new string head is relatively inexpensive. If you don't want to get one, could I suggest you take the old spring (if you have it) and match it up with possibly a new spring at the hardware store. Sometimes you get lucky! Here is the parts diagram for it. Hope this helps!
http://www.ereplacementparts.com/black-and-decker-gh1000-type-grass-hog-trimmeredger-parts-c-4167_9518_9532.html

Easily, the best place and discounted parts place for this Black and Decker trimmer is eReplacementParts.com

Hi,
Try this out...

http://www.ehow.com/how_4914620_restring-black-decker-weed-eater.html

heatman101

For the cordless Grass Hog, the replacement spool is AF-100. You can purchase these spool heads online or maybe find them at your local hardware store, but they may be hard to find because the Grass Hog is not made any more.

http://demandware.edgesuite.net/aaea_prd/on/demandware.static/Sites-black-and-decker-Site/Sites-cpo-master-catalog/default/v1277807851982/dw_manuals/black-and-decker/bdkngh1000/bdkngh1000_manual.pdf

For Black and Deckers: Remove cup from bottom of unit by depressing 2 detent tabs and pulling away from unit. Replace empty spool with new full one or wind on aftermarket string. Wind in direction of arrow on spool. Make sure spool is seated on rachet firmly.

You can order these thru black and decker at blackand decker.com

gearbox!! get rid of it