66Solving ProblemsIf the power light is breathing white — Thecomputer is in standby or the display may notbe responding.• Press a key on the keyboard, move theconnected mouse or a finger on the touchpad, or press the power button to resumenormal operation.• If the display is not responding, press thepower button until the computer turns offand then turn it back on.• If the problem persists, contact Dell (see“Contacting Dell” on page 91).If you encounter interference that hindersreception on your computer — An unwantedsignal is creating interference by interruptingor blocking other signals. Some possiblecauses of interference are:• Power, keyboard, and mouse extensioncables.• Too many devices connected to apower strip.• Multiple power strips connected to thesame electrical outlet.Memory ProblemsIf you receive an insufficient memorymessage —• Save and close any open files and exit anyopen programs you are not using to see ifthat resolves the problem.• See the software documentation forminimum memory requirements. Ifnecessary, install additional memory (seethe Service Manual atsupport.dell.com/manuals).• Reseat the memory module(s) into theconnector(s) (see the Service Manual atsupport.dell.com/manuals).• If the problem persists, contact Dell (see“Contacting Dell” on page 91).If you experience other memory problems —• Run Dell Diagnostics (see “DellDiagnostics” on page 71).• If the problem persists, contact Dell (see“Contacting Dell” on page 91).