Lenovo THINKCENTRE 6019 - Manual (Page 81)

Diagnostic Error Code FRU/Action
305-250-XXX
Monitor DDC self test failure
1. Run Setup to enable DDC
2. Cable
3. Monitor
4. Video card
5. System board
415-000-XXX
Modem
Test Passed
No action
415-XXX-XXX
Modem error
Remove the Modem and re-test the system
Chapter 7. Symptom-to-FRU Index 75