Section 7: diagnostics and troubleshooting, 1 controller diagnostics, 2 troubleshooting display problems – Daktronics Galaxy AF-3220 User Manual
Page 19: Tools required for troubleshooting, Section 7, Diagnostics and troubleshooting, Controller diagnostics, Troubleshooting display problems, Diagnostics and troubleshooting 15, Figure/ label led # color operation run
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