Physical Inspection & Repair:
- Paint the chassis if neccessary
- Replace missing parts such as screws, cover plates
- Repair common damaged parts such as pins, cables
- Visually inspect the printed circuit boards to make sure it’s intact
Functional Tests & Diagnostics:
- Power-on and bootup test
- Reset to factory defaults
- Memory and file system tests
- Run built-in in-depth diagnostics on each component
RF & Connectivity tests:
- Measure RF signal strength and quality on each downstream RF port
- Verify return-path connectivity on each upstream port
- Connectivity test using real modems
- Verify channel bonding capabilities
- Check ethernet and SFP/XFP ports
Stress test:
- Verify stability under heavy load by connecting a batch of modems generatic constant maximum traffic
- Bandwidth tests to verify throughput
- Check bit error rates on all interfaces