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Current version by: TheLastMillennial ,

Text:

Thank you for providing all that information! As you guessed, this is definitely a hardware issue. Could you please provide an image of the corrosion (be sure to check if the corrosion is on both sides of the board)? I can see if there’s enough contact left for you to solder jumper wires in place of the traces.
In the meantime, if you have the mini-USB to mini-USB cable the came with the calculator, you can plug side A (the white side) into the calculator and it will turn on. This is similar to plugging the calculator into the charger but this method does not need a power source and also doesn’t clear the RAM.
+
+EDIT:
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+Alright, I got some help from NoahK. I know you said you checked continuity, but I'll relay that info again. So, the round contacts you see around the button are call test points.
+
+* The test point at the top should be continuous with the circle in the middle.
+* The test point to the top right should be continuous with the ‘floating’ triangles.
+* The test point to the bottom left is ground and should be continuous with the outer ring.
+* '''None''' of the test points should be continuous with eachother
+I know this may be hard to understand through text, so I made a quick color coded picture to explain it: [image|2345312]
+
+Shorting the two non-ground pins (the yellow and dark blue in the photo) will turn on the calculator.
+
+Unfortunately, the ON button is special and isn’t connected to the rest of the key matrix so you can’t just connect the button to other keys. I don’t have the info to where exactly the ON button connects to yet.

Status:

open

Original post by: TheLastMillennial ,

Text:

Thank you for providing all that information! As you guessed, this is definitely a hardware issue. Could you please provide an image of the corrosion (be sure to check if the corrosion is on both sides of the board)? I can see if there’s enough contact left for you to solder jumper wires in place of the traces.

In the meantime, if you have the mini-USB to mini-USB cable the came with the calculator, you can plug side A (the white side) into the calculator and it will turn on. This is similar to plugging the calculator into the charger but this method does not need a power source and also doesn’t clear the RAM.

Status:

open