Thread: Sears radial arm saw - digital readout problem

Lyle, working on probabilities, it is unlikely that the electronics on the PCB would fail under normal operating conditions.

Normally most faults are caused by faulty power supplies, connectors, switches, wiring under flexing conditions, electrolytic capacitors, and often through unintended human intervention.
The actual ICs and transistors on the PCB normally fail due to spikes and transients from mains surges and storm lightning induced spikes, or due to other failing components.

Look firstly for intermittent connections from sensor leads and the like.
Look for a slightly dislodged connector somewhere, or a broken cable between connectors.
Check the internal connections on the main PCB, and the entry connections to the main display unit.
Look at the areas of the whole system which have been moved or recently worked on.
If it is possible to reset the system, do this.

mike