On one of them the charging light comes on and a blue ( bluetooth ) led comes on then blinks and I can connect my phone to it, but then after a short time it goes off and only the charging light remains on, but no activity with the turntable motor activating !.
on the other one no lights come on .
IC's as in order left to right as per pic uploaded:
1st: top 28pin, BK3254SS28B
2nd: top 8pin, HT135T
1st: bottom 6pin, B6286T
2nd: bottom 16pin, YD3412
Exectly the same has these
https://vinylrestart.com/victrola-vs-cr ... omparison/
This is a very difficult job to do, especially if you are not aquainted with dealing with SMDs (Surface Mounted Devices). SMDs are close together on a board, and often very difficult to replace. A schematic is absoutely essential if you are going down to board level, or if you cannot ascertain the value of a faulty component.
You may well have reached the state of "mend it with a new one". Try to find a working board on EBay or similar - that should be cheaper in the long run if you find yourself working for a long time with no results!
Sorry to be a bit of a doubter here.