You don't have to acknowledge the tamper if you are in engineering mode. You just need to 'esc' out and get the 'checking tampers' message. If you still receive the tamper warning for 0004, then the contact between the 'T' and '0V' terminals is not good. If you have a meter, then check these pins to ensure there is no voltage differential present. Ie. 0V. If you get 0V, then the board may be faulty, or be in some wierd 'Flex' state.