33Solving ProblemsIf you experience other memory problems —Ensure that you are following the memory•installation guidelines (see the ServiceManual at support.dell.com/manuals).Check if the memory module is compatible•with your computer. Your computer supportsDDR3 memory. For more information aboutthe type of memory supported by yourcomputer, see “Specifications” on page 60.Run the Dell Diagnostics (see “Dell•Diagnostics” on page 40).Reseat the memory modules (see the• ServiceManual at support.dell.com/manuals) toensure that your computer is successfullycommunicating with the memory.Lockups and SoftwareProblemsIf 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.