Autool BST-100 - Chapter 4 Daily Maintenance; Troubleshooting Common Faults

AUTOOL BST-100 Battery System Tester User Manual
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Chapter 4 Daily Maintenance
4.1 Eliminate Common Fault
4.1.1 Screen Not Light
l Check connection with the battery whether it's well or reverse
connected.
l Check the test cable whether break off or drop down.