My janome harmony 9102D serger I think is out of

try this link
Janome 9102D Harmony Parts

You may download a copy of the manual from here.

try changing the needles---are the needles the correct size for
the fabric being sewed?
make sure you have long thread tails--that what I do on my
serger
you can try to post the picture

here's some links,, choose which one you like
http://www.sewingpartsonline.com/instruction-manual-janome-9102d.aspx

http://www.sewingshop.com/9102DMANUALPDF.aspx

http://sewingcenter.us/vmchk/Janome-Sewing-Machine-9102D-Manual/flypage-ask.tpl.html

With yhe right model, check in this links:
- thefind.com/appliances/browse-janome-sewing-machine-instruction-manual
- sewingnz.com/products/Janome-New-Home-Finesse-234d-Overlocker-Serger-Machine-Instruction-Manual-Book.html

Hope helps.

Here is a step by step guide on replacing and threading the upper loop on your serger. If this does not work, the Janome website suggest using the DVD that came with your model for a step by step video.

I could not find a manual to download, but at the Janome site you may find another serger similar to yours and download (free).

Look thought the retired models as well.

When you find one, click on specifications and a PDF download icon will come up on the screen.

If that is not satisfactory, contact Janome's customer service at the same site.

http://janome.com/index.cfm/Machines/Sergers

I have read two postings on this particular model. One owner indicated the only instructions came on a VHS tape and the other was looking for a replacement manual as the dog and destroyed their original!!!!

I would contact Janome for a manual, or use this generic version for threading -
http://www.threadbanger.com/threadheads/episode/THR_20080704

Another good source for serger basics is Nancy Zieman's book "Serge With Confidence". The book has much more than a manual usually provides.

i was able to find manual at www.ifixmachines.com

http://janome.com/index.cfm/Machines/Accessories