I went through a similar scenario with my G2 SE.
While rebuilding it after a crash, I read what there is of the manual and made changes to several settings.
I was focused on dip 10 and 11 - big mistake.
My biggest mistake was not writing down the dip switch settings as soon as I removed the cover plate.
The manual that was sent with the G2 is close to useless.
Download the Walkera 35#C manual from www.walkera.com
I can tell you, that I can't get to that website without going through google and searching on rc helicopter walkera and then selecting the appropriate site.
You cannot use the dip switch settings from this manual, but it is excellent in several explanations regarding the heli.
This assumes that your G2 has the WK 2601 2.4 transmitter and 2701receiver.
If you have the 72Mhz, then download the manual for the Walkera 36. (download this one anyway, as it is the sistership to the G2)
Andy will write that dip switches 4 and 9 must be on.
Mine will not work unless 2, 4 and 9 are in the on position.
All others are in the off position.
The #12 dip switch is the one I messed with, because I was using my (apparently too fat) fingers to turn on and off the switches nearby and accidently moved 12 to the on position.
This one was a huge problem to resolve.
A previous post suggested resetting dip 12 by moving it to on and then setting the right knob to the 3 o'clock position and the left knob to another position.
This is to stop the heli from spinning. (Look up "my helicopter is still spinning" on this forum)
Read the manual that I referenced above, and you will be able to figure out a lot of this on your own.
The first thing to do is to disconnect the motor, (I put different colored tape on each connection - makes it easy to reconnect) plug in the batt and transmitter, you know the drill,and run through the controls.
You will know right away if the servoes appear to be working in the proper order.
I spent more than an hour of test flighttrouble shooting (yes, about 5 batteries worth - you know the drill, fly 12 to 15 minutes, recharge for 3 hours, fly, recharge for 3 hours etc...) which took 3 nights after work to complete. I even verified the proper position for the throttle dip switch. If you get this one wrong you can lose the heli and harm others.
Last night I achieved stable flight, except now while the rotor blades are spooling up, the heli makes a 270 degree ccw turn. Hmmmm. But I can achieve a stable hover and land without having to buy parts.
I don't trust the heli yet, but hope I can spend more time flying and less time repairing.
Bottom line, if I had it to do all over again, I would have never taken the cover off of the dip switches.
Next heli I buy will be returned, if it arrives with an operators manual like the useless document that came with the ExceedRC G2 SE.
Andy does one hell of a good job, if he weren't part of this forum, Imight have "recycled" this heli.