Hey guys please help been stuck for a week with this issue

[Silberstrom]

Has anyone had any luck with (go ecm)? I purchased a reman exchange ecm for the 871 part# 3684275 it lasted all of three days before the first instance of not starting now completely dead! won't power up, will not communicate with in insite. Now I need to know if I should send it back for warranty or send it to someone else, a new one isn't really an option I checked the dealer 40 plus days lead time. Before the questions come it was programed by an admin: the wake up signal from the key is at the appropriate pin and the appropriate voltage, grounds, power cables, fuses everything is good i even added an extra fresh #2 from the block to the batteries.