Assistance requested. I fly a 1970 M20E that for the first time decided to refuse my command to raise the gear after takeoff. I selected gear up and nothing happened. The light remained green and no other actions taken by the plane to heal itself of the landing configuration setup. I landed, placed it on jacks, checked the weight on wheels switch to no avail. I am not certain if the switch is working or not however before I replaced it, I wanted to make sure I checked all other possible areas that could have also caused the gear to remain down and locked. I have reset the breakers for the gear however, I am not sure I fully understand what other switches may also need to be checked. Any suggestions? I don't think it is the gear switch however, I am not even sure about that.
I will take guidance from anyone who has any suggestions that don't require me to drop the belly pan!
Thanks,
Bill