Sounds like the (internal) neutral safety switch (<- is that the TRS). You might want to contact Lubinator as he had a similar issue. Let me gat back and repost if I got the member wrong but I'll start looking for the thread for the member. Just because they claimed to have replaced it doesn't actually mean that it's good just because it's new. How old was the original before it was allegedly replaced?
(edit) sorry it was jacksonsnorth and here's the thread: http://ramforumz.com/showthread.php?t=113784