if you can emotionally check out but legally remain, thats ideal. you are mostly likely getting pushed out, so recognize that you are in a 100% adversarial relationship and separate yourself from any kind of personal emotional investment. a completely detached self interested approach is totally warranted given the circumstances, and would significantly increase the probability that you will be compensated more fairly.
IMO. No serious investor will give money to a company where someone who owns 40% of the equity is no longer involved and/or left on bad terms. Having him around but not active is going to limit how the business raises money in the future.
