Dell Latitude 7220 Service Manual

Also see for Latitude 7220: Setup and specifications User guide Quick start Setup and specifications

Contents

• Computer is running on battery and the battery has more than 5 percent charge.• Computer is in sleep state, hibernation, or turned off.The power and battery-status light blinks amber along with beep codes indicating failures.For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed bya pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.The following table shows different power and battery-status light patterns and associated problems.Table 13. LED codesDiagnostic light codes Problem description2,1 Processor failure2,2 System board: BIOS or ROM (Read-Only Memory) failure2,3 No memory or RAM (Random-Access Memory) detected2,4 Memory or RAM (Random-Access Memory) failure2,5 Invalid memory installed2,6 System-board or chipset error2,7 Display failure2,8 LCD power rail failure. Replace system board3,1 Coin-cell battery failure3,2 PCI, video card/chip failure3,3 Recovery image not found3,4 Recovery image found but invalid3,5 Power-rail failure3,6 System BIOS Flash incomplete3,7 Management Engine (ME) errorCamera status light: Indicates whether the camera is in use.• Solid white — Camera is in use.• Off — Camera is not in use.Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.• Solid white — Caps Lock enabled.• Off — Caps Lock disabled.Recovering the operating systemWhen your computer is unable to boot to the operating system even after repeated attempts, it automatically starts Dell SupportAssist OSRecovery.Dell SupportAssist OS Recovery is a standalone tool that is preinstalled in all Dell computers installed with Windows 10 operating system. Itconsists of tools to diagnose and troubleshoot issues that may occur before your computer boots to the operating system. It enables youto diagnose hardware issues, repair your computer, back up your files, or restore your computer to its factory state.You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their primaryoperating system due to software or hardware failures.For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at www.dell.com/support.82 Troubleshooting

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