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

[lemontea]

Ok, so after cleaning the contacts, I reassemble the top half.

It is NOT easy to reassemble, as you are trying to NOT twist the metal tabs too much (just enough to make the PCB stay), since you are still testing, and then you don't want to create the PCB dust (either so you don't breathe it, and/or not have it fall onto the LCD connectors --- more about THAT one later).

Now, power test!

I tried to reassemble the calculator with the bottom half.

WHAT A HASSLE!!!

It is even harder to close up than to open it, if you can believe that!

The heat stakes are probably the problem, as the latches seem to close fine. Anyway after some time I decided to leave the closing up for later. I am still testing anyway.

So, need to power the thing.

Out comes my alligator clips and... should I use a power supply or just batteries?

Let's go with batteries. Don't have AAA battery holder but AA should do. Found a 3 AA holder that I salvaged a few years ago from some junk toy (knew it would come in handy, even though my wife said otherwise, haha!).

Well, did the calculator power on?

Big fat nope!

Maybe it needs more cowbell...

Ok, let's bring out the wall adaptor, set to 4.5 volts...

Still doesn't work!