Hi Jeff,
Your board supplier could be correct in this way.
The board could have had just a hair left of copper on the circuit, which would hold up under the electrical test process, but once you powered it up, then there was enough juice to burn the copper hair away, which now is causing an open.
it sounds far fetched, but I ran an electrical test dept. for 10 years and have seen this happen many times.
This does not take responsibility away from your board supplier. They are still responsible for the error, unless they can prove that you over powered the board.
They should be at least covering the cost of the Bare PCB.
Best Regards, BoardHouse
reply »