Exactly , the problem is in access1 module. In case if the warrantly is gone for your module , you can simple open it and try to troubleshoot. There are two level of boards , like a pie , and one with flat cablle , comming from the bottoms , as I remember.
Especially , pay an attemtion to disconnect that flat cable. Tnen , using magnifier lamp , inspect outer board , where are located PWM power supplies chips which provided power for processor , periphery and also for disply indicators. I'm pretty sure , you will find something burned down.
Good luck with the findings !

If you tried a diffrent access 1 and it worked, i recommend replacing the whole access 1. It sounds like a part of the board in the access 1 was damaged, the beep would represent an error with the access 1 module.