160 Troubleshooting Your System9 Check the memory channels and ensure that they are populated correctly.See "General Memory Module Installation Guidelines" on page 93.10 Reseat the memory modules in their sockets. See "Installing MemoryModules" on page 98.11 If applicable, replace the cooling shroud. See "Installing the CoolingShroud" on page 89.12 If applicable, slide the front chassis back. See "Front-Chassis Assembly" onpage 90.13 Close the system. See "Closing the System" on page 77.14 Reconnect the system to its electrical outlet, and turn on the system andattached peripherals.15 Enter the System Setup program and check the system memory setting.See "Memory Settings Screen" on page 57.If the problem is not resolved, proceed with the next step.16 If a diagnostic test or error message indicates a specific memory module asfaulty, swap or replace the module.17 Open the system. See "Opening the System" on page 76.18 If applicable, move the front chassis assembly. See "Front-ChassisAssembly" on page 90.19 If applicable, remove the cooling shroud. See "Removing the CoolingShroud" on page 88.20 To troubleshoot an unspecified faulty memory module, replace thememory module in the first DIMM socket with a module of the same typeand capacity. See "Installing Memory Modules" on page 98.21 If applicable, replace the cooling shroud. See "Installing the CoolingShroud" on page 89.22 If applicable, slide the front chassis back. See "Front-Chassis Assembly" onpage 90.23 Close the system. See "Closing the System" on page 77.24 Reconnect the system to its electrical outlet, and turn on the system andattached peripherals.