It can happen https://ogrforum.com/...44#47326445784494344
As said in countless threads and topics before, call Lionel support on your 990 CAB2 set when you have a problem. They have been fixing them under warranty.
http://www.lionel.com/contact
https://www.lionelsupport.com/warranty
Instructions for Obtaining Service
If service for this Lionel LLC product is required you must FIRST call 1-800-4LIONEL (1-800-454-6635), Email Talktous@lionel.com, or write to:
Lionel Customer Service
6301 Performance Drive
Concord, NC 28027
Please have the Lionel product number and original receipt showing the date, location of original purchase, and description of problem. You will receive a return authorization (RA) number to ensure your merchandise will be properly tracked and handled upon receipt at Lionel LLC.
Once you have your Return Authorization (RA) number, make sure the item is well packed to protect during shipping. (The original packaging was designed to protect product during transit)
Please make sure you have followed all of the above instructions carefully before returning any merchandise for service.