Realigning or reseating the digitizer cable correctly is often necessary after a screen replacement, as touch screen functionality depends heavily on a secure and proper connection. Factors such as dust on the connector or misalignment can cause improper touch input, which matches the symptoms described in the scenario. While recalibrating the touch screen might be another step, it assumes that the digitizer is already correctly installed, making this a subsequent action to ensure proper functionality after addressing hardware concerns like cable connections. Updating the device's firmware or restarting the tablet are appropriate troubleshooting steps for software-related issues, but given that the scenario describes a hardware change (screen replacement), they do not address the fundamental issue described.