We just did the memory upgrade on a MK2A and it now freezes after a few button presses. Attempting access to Hijack yields a "Sigkill" error message. There does not appear to be a short anywhere in the soldering and the terminal reports all extra memory as passing. The weird thing is it reports 48 MB rather than 32MB. Disconnecting the RAS line from the extra memory restores the player to regular operation. Any ideas?

Thanks,
Stu