On my Singer 6235 sewing machine, needle will not pick up bobbin thread. Any suggestions to fix the problem?

SOURCE: How do I fix a

Here's how you set the timing od the Machine alright:
1. Take the side plate off, take the needle plate off.
2. Take the presser foot off, and put a new needle in the machine. 3. Make sure that the needle is in the lowest position and look at the needle bar for the two timing lines. Locate the top line.
4. Then, turn the handwheel toward you until the top line is where the bottom line was.
At this point, the tip of the hook should be directly in the scarf of the needle.
This should set the timing of the machine perfect....

SOURCE: Sewing machine will not pick up bobbin thread.

needle's in backwards

SOURCE: Singer Pixie - trouble threading bobbin

look at the bobbin direction. if it dont pick up that way, change the direction

SOURCE: Singer 457 Zig Zag Sewing Machine not catching bobbin thread.

There are manuals avilable online to purchase for the singer machines, SOrry I was not able to locate a site that has them for free.
.... http://sewingonline.co.uk/singer-manuals.html

SOURCE: I have an old singer sewing machine 401A. The top

You can download a manual for $10 at www.sewingmanuals.com and it should help you. A couple of suggestions though, is your needle inserted correctly? Flat side facing the rear of the machine, fresh needle? Threaded correctly on top and bobbin area? Is your thread good not too old and the same type in bobbin and top? Did you leave a long enough tail in the bobbin thread? 3-4 inches which you hold with your left hand. Is the thread in the bobbin unwinding the right way? Are you turning the handwheel towards you, not away from you at least two revolutions or until you see the thread loop? Try these suggestions, and I am sure one will work unless your timing is off and it needs professional service.