I must have missed something in the upgrade process from 2 TOS 102 to 6 chip TOS 104 on my STF.
Before : Works fine with Tos102fr

After : White screen, the ST seems to boot loop.

Oh and also tried to remove the 74LS11N : Same problem.
The most surprising thing is that I didn't install the sockets, they were there from the beginning.
So it "should" work.
Any idea ?
Thanks
PS : And B.T.W., i saw this very helpfull post wich describes the opposite (6 to 2). I don't understant why because you can't find 2 chips TOS upgrades anywhere
