Troubleshooting cooling problems................................................................................................................................... 167Troubleshooting cooling fans...........................................................................................................................................168Troubleshooting system memory.................................................................................................................................... 168Troubleshooting an internal USB key...............................................................................................................................169Troubleshooting an SD card............................................................................................................................................ 170Troubleshooting an optical drive...................................................................................................................................... 170Troubleshooting a tape backup unit................................................................................................................................. 171Troubleshooting a hard drive............................................................................................................................................ 171Troubleshooting a storage controller................................................................................................................................172Troubleshooting expansion cards.....................................................................................................................................173Troubleshooting processors.............................................................................................................................................174System messages............................................................................................................................................................174Warning messages.................................................................................................................................................... 174Diagnostic messages.................................................................................................................................................174Alert messages..........................................................................................................................................................17410 Getting help............................................................................................................... 175Contacting Dell............................................................................................................................................................... 175Documentation feedback................................................................................................................................................ 175Accessing system information by using QRL................................................................................................................... 175Quick Resource Locator for R830............................................................................................................................. 1767