How do you change the light bulb on the Disney 270D embroidery machinr

SOURCE: Instrucitnos for Brother SE-270D Timing Problem

This is not really something you can do yourself (been there, tried that!). The machine has to be almost completely disassembled to get to the timing mechanism. Trust me, it's worth the 30.00 to have it timed.
I think http://www.allbrands.com has a generic timing explaination for sewing machines (use the drop in bobbin one)...I found it easy to follow...but once I realized I had to unplug all the components for the computerized functions... I took it in to the dealer. If you contact Brother & your machine is under warranty, they will pay for the repair (they paid for my first two re-timings). Now I know you HAVE to use BOBBIN thread that is 60 WT only in the bobbin. You will continue to have problems if you don't. Also, this machine uses the class 15 bobbin, but make sure its model number SA156A, which is a hair taller than the SA156 bobbin..both are class 15, but the tiny difference is very important.

SOURCE: DISNEY BROTHER SE-270D COMPUTER SEWING & EMBRIODERY

but is the carriage moving,? if not disconnect and try to connect again, the embroidery hoop holder usually moves to check itself, if it still does the same thing the connection that goes onto the machine is not making a proper connection, I also had this problem, with a 2100 brother , I fixed it by using a crochet hook and just tightening the connection that connects to the machine on the embroidery unit, but tread very carefully it just takes a slight move. if this fails it will have to be adjusted cost is usually $100au

SOURCE: Embroidery machine patterns are not consistant

I'm just beginning to work with my machine, but I have had a similar issue. Some of the possible solutions that I have found include (note: I've tried #1, I will try 2 and 3 soon)...
1. use stabilizer fabric.
2. if you're using tear-away stabilizer, and it is tearing prematurely, try a cut-away stabilizer (or maybe iron-on stabilizer?).
3. if you're embroidering on fabric like fleece, try 'hoopless embroidery' This involves using adhesive stabilizer - put the stabilizer in the hoop with no fabric, (if you don't have adhesive stabilizer, use regular stabilizer and spray it with a craft adehesive) then lay your fabric over the hoop and press the fabric onto the adhesive.
good luck.

SOURCE: brother embroidery machine broken

make sure the bobbin thread is wound and installed correctly
remove tangled thread and clean lint out from under feed plate
clean and remove shuttle to clean out area with lint brush
inspect bobbin for burs and scratches...make sure when reinstalling shuttle and bobbin that it rotates freely
hope this helps