Symptom ActionThe operating system does notstart.Verify that:• The startup sequence includes the device where the operating system resides.Usually, the operating system is on the hard disk drive. For more information,see “Selecting a startup device” on page 59.The computer beeps multipletimes before the operatingsystem starts.Verify that no keys are stuck.Accessing Control Panel on the Windows 8 or Windows 8.1 operatingsystemOn the Windows operating system, you can view and change computer settings through Control Panel. Toaccess Control Panel on the Windows 8 or Windows 8.1 operating system, do one of the following:• From the desktop1. Move the pointer to the top-right or bottom-right corner of the screen to display the charms.2. Click Settings.3. Click Control Panel.• From the Start screen– For Windows 8:1. Move the pointer to the top-right or bottom-right corner of the screen to display the charms.2. Click Search.3. On the Apps screen, scroll to the right side, and click Control Panel in the Windows Systemsection.– For Windows 8.1:1. Click the arrow icon in the bottom-left corner of the screen to go to the Apps screen.2. Scroll to the right side, and click Control Panel in the Windows System section.Troubleshooting procedureUse the following procedure as a starting point for diagnosing problems you are experiencing with yourcomputer:1. Verify that the cables for all attached devices are connected correctly and securely.2. Verify that all attached devices that require ac power are connected to properly grounded, functioningelectrical outlets.3. Verify that all attached devices are enabled in the BIOS settings of your computer. For more informationabout accessing and changing the BIOS settings, refer to your Chapter 6 “Using the Setup Utilityprogram” on page 57.4. Go to the “Troubleshooting” on page 39 and follow the instructions for the type of problem you areexperiencing. If the Troubleshooting information does not help you resolve a problem, continue with thenext step.5. Try using a previously captured configuration to see if a recent change to hardware or software settingshas caused a problem. Before restoring a previous configuration, capture your current configuration incase the older configuration settings do not solve the problem or have adverse affects. To restore acaptured configuration, do the following:• For Windows 7: Click Start ➙ Control Panel ➙ System and Security ➙ System ➙ SystemProtection ➙ System Restore.38 ThinkCentre M73 Hardware Maintenance Manual
