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"Dropped once and now it doesn't switch on." A bit grubby but the LCD looked to be in OK shape (no scratches or bruises). Popped in some batteries and it did switch on, but that PCB to LCD flex cable has clearly had enough.

Ben Ryves

@benryves.com

16 Sept

The battery compartment is connected to the main PCB with extremely thin wires that usually snap at the solder joint, which I assumed was the cause of the fault before buying the calculator. Signs of corrosion and the wires fell off the board when I took the back off, but that's an easy fix.

Ben Ryves

@benryves.com

Using the guide from benryves.com/journal/3763... I chased down all of the missing rows and columns then pressed the affected part of the flex cable back on the board with a soldering iron set to 220°C.

16/9/26, 10:25 pm0 reposts2 likes

Ben Ryves

@benryves.com

16 Sept

I still need to clean up the battery terminals and replace the wires between the two halves of the calculator, but no hurry as I want to keep an eye on the LCD repairs before sealing everything back up. When done I'll print a label out as a reminder of when I did the repair, and... oh, bugger!