Sore throat

My machine, a Knitmaster 700, is not well. Some kind of ailment has infected it which is causing looping on the left end of the bed. I have attempted several home remedies-removal and checking the sponge bar (in good condition as put in a new one last year and have not used the machine), removal of all needles which I then cleaned and checked (three suspect slightly bent ones I have replaced), checking of all wheels and cogs on carriage-nothing unusual found.

Now I am totally flummoxed, what is the ailment and where can I find a cure?

If anyone has an idea I would be pleased indeed to try out any suggestions.

Here is a photo of the problem. 

No Knitting

It seems I have lost my mojo, no knitting now for about a year. Machine sits forlornly there patiently waiting for my touch like a basset hound in a mansion.