System board LEDs .  .  .  .  .  .  .  .  .  .  .  291
General problem determination procedures .  .  .  .  293
Resolving suspected power problems .  .  .  .  294
Resolving suspected Ethernet controller  
problems .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  294
Troubleshooting by symptom .  .  .  .  .  .  .  .  .  295
Hard disk drive problems .  .  .  .  .  .  .  .  .  295
Fan problems .  .  .  .  .  .  .  .  .  .  .  .  .  .  297
Intermittent problems.  .  .  .  .  .  .  .  .  .  .  298
Keyboard, mouse, KVM switch or USB-device 
problems .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  299
Memory problems .  .  .  .  .  .  .  .  .  .  .  .  300
Monitor and video problems .  .  .  .  .  .  .  .  304
Network problems .  .  .  .  .  .  .  .  .  .  .  .  305
Observable problems.  .  .  .  .  .  .  .  .  .  .  306
Optional-device problems .  .  .  .  .  .  .  .  .  309
Power on and power off problems .  .  .  .  .  .  311
Processor problems .  .  .  .  .  .  .  .  .  .  .  312
Serial-device problems .  .  .  .  .  .  .  .  .  .  313
Software problems.  .  .  .  .  .  .  .  .  .  .  .  313
Appendix A.  Hardware disassembling for 
recycle .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 315
Disassemble the server for chassis recycle .  .  .  .  315
Appendix B.  Getting help and 
technical assistance .  .  .  .  .  .  .  .  .  . 317
Before you call .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  317
Collecting service data .  .  .  .  .  .  .  .  .  .  .  .  318
Contacting Support .  .  .  .  .  .  .  .  .  .  .  .  .  319
Appendix C.  Notices.  .  .  .  .  .  .  .  .  . 321
Trademarks .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  322
Important notes .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  322
Telecommunication regulatory statement.  .  .  .  .  322
Electronic emission notices .  .  .  .  .  .  .  .  .  .  323
Taiwan Region BSMI RoHS declaration.  .  .  .  323
Taiwan Region import and export contact  
information .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  323
Index .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 325
ii ThinkSystem SR860 V2 Maintenance Manual