All the modules of R3680E cannot work, and we suspect a problem with the router.
1. Pull out all the modules from the router, and the router can start normally; plug the E1 module of good quality into the slots of the router one by one, and it can work well, so we conclude that the router works well.
2. Check the module pulled out from the router, and one is obvious burnt. Plug all the other modules except the burnt one into the router, and it can work well, so it is confirmed that the problem is resulted from the burnt module.
1. The router cannot work;
2. The power module and other modules cannot work;
You'd better to troubleshoot the problems by screening methods, and locate it by devices one by one.