Repair Replacing Sound Boards in Two Lionel Locomotives

[Flintlock76]

I saw your post on the "Classic Trains Forum" and left an answer there.

But it's good you posted here to cast a wider net!

https://cs.trains.com/ctr/f/3/t/295742.aspx

[Locojunkie]

Hi, Everyone, I need some direction on replacing the sound board in 2 of my Lionel Locomotives. The First I want to replace the Sounds of Steam Board in my Lionel Rock Island 4-8-4. The original board seems to be malfunctioning as it works 1/2 the time. The Second locomotive is a ACL Silver Shadow 4-6-4. I purchased this locomotive second hand. It does not have a sound system in it. The previous owner removed it. I am planning on getting a replacement tender chassis for this locomotive anyway. My questions are can I get a upgraded sound board for the 4-8-4 or a dcc board for the 4-8-4? Is there a current Lionel sound board that will work in the 4-8-4 to replace the old one? Also, is there a sound system replacement for the ACL 4-6-4 that I can purchase to upgrade it as well. Thanks ladies & gentlemen for your help as always.