Recently acquired a Plus/4, It is in good cosmetic condition, but it has a dead TED chip, possibly more (swapped dead one with the TED in my c16, got some life but not fully working). I need a TED chip so I can continue diagnosis.
If you have one you can spare, please contact me via the PM system or at blainep23(at)gmail.com.
Up and running - VIC 20, C64, C16. Works in progress - Plus/4, C128, Amiga 2000. Looking for - C= Colt/PC compatibles and vintage consumer electronics.