Texas TI-58: Repairing the keyboard bounce and miss to register keystrokes

Dissemble the keyboard.

Prepare the keyboard 9 rows  joint points by tinning them.

Prepare the 9 Dome row sets by tinning the joint points on both sides.

Put back the 9 dome row sets by soldering them to the keyboard 9 rows joint points.

Re-apply the plastic cover to the 9 sticky dome row sets.

Testing. No bouncing and no missing keys.