Most customers assemble their GT-102's and find first time success. I guess you've visited this page because Edsel Murphy, author of "Murphy's Law", has visited you and your GT-102. That unsavory son-of-a-gun visits us all at one time or another, so as Bill Clinton used to say, "I feel your pain". Here are some hints to get your newly assembled GT-101 fully working.
In no particular order, here are some of the problems that have been reported:
Are you tired, hungry, or upset? Go away from the problem, take a nap, have a bite, and calm down. I know this may seem condescending, but I have solved many problems quickly after taking a break. Sometimes you can be too close to the problem to see it clearly.
Explain the problem and what you've done to anyone. They don't have to be technical. It could be your spouse, your kids, your dog or cat. Sometimes just the act of explaining your situation aloud leads you to the solution.
Take the best possible pictures you can of whichever assembled PCBs (both sides if possible, but certainly from the component side) are giving you trouble. Include pictures of the I/O connectors. Send the pictures with a description of the problem to dan@updatemydynaco.com. I'll look at them, and usually we can find the problem inside of a few email exchanges.
If we can't get to the bottom of the problem by email and pictures, we can arrange a Skype session.
If none of that works, we can make arrangements for you to send the module in question in for trouble-shooting. If the problem resolves to a bad component, there is no charge for trouble-shooting or mailing. If the problem is caused by a soldering problem or swapped components, then you'll pay shipping both ways and a $25.00 repair fee for each module submitted for repair. We reserve the right to refuse to repair a module if its construction has made it impractical to do so. In that case, you may choose to purchase a replacement module in either kit or assembled form, assuming they are available at the time of your request.