Here we go.... (48G fixing and MEMORY UPGRADE)

[lemontea]

Note that the annunciator does NOT turn off even after powering off the calculator.

And by the way, this PCB is actually from the first 48G, the one with the corroded contacts. So, we at least know it works.

Are the PCBs all-or-nothing when it comes to functioning? I could not initiate the self-tests. Somehow it won't let me, although I tried a few simple calculations.

The CPU speed also seems quite slow refreshing the screen. It is noticeable when first powering up and seeing the initial splash screen.