Hello, I have been reading over several of the problems people have experienced with the MediaTek MT3329 (?) GPS that ships with APM2. I have not been able to get any signal out of the unit. I have done the check for poor solder joints suggested in one thread. I had an external GPS board from my APM1 so I tried it out on the APM2's I2C and it came on line after about 9 or 10 minutes. Also, I have another MediaTek MT3329 unit from another APM2 that I tried to no avail.
Using the input ground pins as ground, I checked for voltage on each of the 6x2 pins and got something like 4.8V on a few pins, about half that on one pin, and a very slight amount (<1V) on several others. So I don't think it is overvoltage as suggested in another thread. Any suggestions on further troubleshooting? The myriad of posts doesn't instill confidence in these units.