I have an 05 Roadster that's been exhibiting all the "mystery no start" symptoms on and off for a while. Recently the no starts got a lot more frequent, and now it finally just won't start. I was sure it was an RCM issue because when it wouldn't start if I moved/tapped on the RCM casing it would usually fire back up. So I tried having the RCM resoldered thinking that would take care of my issues after the research I've done. I hooked the resoldered RCM back up and still nothing

I don't know where to look or what to try next. Any suggestions on what else the issue could be or what to try next? I would really appreciate it!