It's impossible for this to be a hardware problem. It's just firmware running on a CPU inside the OBi, and if it works on one SP, it should work on all SPs.
I suggest that you start completely over.
Delete the OBi 200 completely off of your OBiTALK dashboard. Wait a few minutes while OBiTALK remotely resets your device, and the power LED stops flashing. Then, pull all three plugs out of the OBi (telephone, Ethernet and power).
Turn the OBi upside-down on a flat surface. Find the small bump with the hole in it. Using a straightened paper clip, gently depress the recessed button until you feel a click. Continue to hold down the button while you plug in only the power plug. Wait at least 10 seconds or longer. Release the button. Wait another couple minutes until the LEDs settle down. Pull the power plug.
Log into each of the two Google accounts, one at a time, and go to this page:
https://myaccount.google.com/security?pli=1#connectedappsLook at the section that says "Apps with access to your account". Click the link that says "MANAGE APPS". On the next page, find and delete the OBiTALK Google Voice item. Sign out of the account, and repeat this with the other account, then sign out of that account.
Plug back in the Ethernet and phone plugs. Plug in the power plug. Wait for it to boot up. Add it back to the portal, using the **5 procedure. Do NOT make any changes on the local web page (192.168.x.x or 10.0.x.x). Just follow the steps to configure Google Voice on SP1 and SP2.