27Solving ProblemsIf you experience other memory problems —Ensure that you are following the memory•installation guidelines (see the ServiceManual on the Dell Support website atsupport.dell.com).Check if the memory module is compatible•with your computer. Your computer supportsDDR2 memory. For more information aboutthe type of memory supported by yourcomputer, see “Specifications” on page 52.Run the Dell Diagnostics (see “Dell•Diagnostics” on page 34).Reseat the memory modules (see the•Service Manual on the Dell Support websiteat support.dell.com) to ensure that yourcomputer is successfully communicatingwith the memory.Lockups and Software ProblemsIf the computer does not start up — Ensurethat the power cable is firmly connected to thecomputer and to the electrical outlet.If a program stops responding — End theprogram:Press simultaneously.1.Click2. Applications.Click the program that is no longer3.respondingClick4. End Task.If a program crashes repeatedly — Check thesoftware documentation. If necessary, uninstalland then reinstall the program.NOTE: Software usually includesinstallation instructions in itsdocumentation or on CD.