Casio f-91w repair - Mar 2025

Old digital watches have some flaws too...

DESCRIPTION

I found an old F-91w from the 90’s.
The strap was completely decomposing so I changed it with this one from HDDWatches.
I was disapointed to see that even with new batteries it would not start !

That is how the disassembly began…

The actual working watch

Screw u

Further disassembly

Even further disassembly

Battery removal

Battery connector removal

I cleaned the contacts with some contact cleaner and a q-tip, to no avail…
Before disassembling the LCD assembly I noticed that pressing on the battery made the LCD work.
I tried bending back the contacts to see if it could be that simple.

It was actually that simple

The metal strips were flat before my operations, here is what it looked like before re-assembly.

The faulty contacts