Sorry didn't realize the post I was trying to post to was closed out..This is from a Corona V4 and I'm trying to rewrite the original nand back. Problem is after 27 seconds it's goes to a red ring. I read from Martin C that the CB/CF LDV might be mismatching so I would kindly like someone to double check me. kernal 16757 i just did a full dump, wrote xell using Jrunner, got the goodies, rewrote the full dump back and red ring after 27 seconds. I desoldered everything to no joy.