Common Error Codes Startup Messages Boot Sequence
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Application 220-902 3. Diagnosing, and Troubleshooting 3.1 Recognize and interpret the meaning of common error codes and startup messages from the boot sequence, and identify steps to correct the problems. Common Error Messages and Codes Boot failure and errors Invalid boot disk Inaccessible boot device Missing NTLDR Bad or missing Command interpreter Startup secure boot violation messages Error in CONFIG.SYS line XX Himem.sys not loaded Missing or corrupt Himem.sys Device/Service has failed to start A device referenced in SYSTEM.INI, WIN.INI, Registry is not found Event Viewer – Event log is full Failure to start GUI Windows Protection Error User-modified settings cause improper operation at startup Registry corruption Using the correct Utilities Dr. Watson Boot Disk Event Viewer Common Error Messages and Codes Boot failure and errors Invalid boot disk Inaccessible boot device Missing NTLDR Bad or missing Command interpreter Invalid boot disk This error appears if the MBR (Master Boot Record) of your hard drive is not okay. Ensure that that you do not have a floppy disk inserted in your floppy drive. Also make sure that the CMOS setup is pointing to the correct partition in your hard disk. Sometimes, it might happen due to corrupt boot sector. Run any antivirus software to detect and correct boot sector viruses. Inaccessible Boot Device The most likely reason is
Downloads Links Message Board Vote Guestbook Info Games - play Search Next Back A+ Operating Systems Technologies Exam Objectives <<< windows boot manager Domain 2.0 Domain 4.0 >>> DOMAIN 3.0: Diagnosing and Troubleshooting This windows failed to start domain requires the ability to apply knowledge to diagnose and troubleshoot common problems relating to Windows 9x boot device not found and Windows 2000. This includes understanding normal operation and symptoms relating to common problems. Content Limits 3.1 Recognize and interpret the meaning of common error codes and startup http://www.simulationexams.com/tutorials/aplus/operating-systems/diagnosing-3.1.htm messages from the boot sequence, and identify steps to correct the problems. Content may include the following: Safe Mode No operating system found Error in CONFIG.SYS line XX Bad or missing COMMAND.COM HIMEM.SYS not loaded Missing or corrupt HIMEM.SYS SCSI Swap file NT boot issues http://www.oocities.org/learnprogramming123/aplussyllabusos4.html Dr. Watson Failure to start GUI Windows Protection Error Event Viewer Event log is full A device referenced in SYSTEM.INI, WIN.INI, Registry is not found 3.2 Recognize common problems and determine how to resolve them. Content may include the following: Eliciting problem symptoms from customers Having customer reproduce error as part of the diagnostic process Identifying recent changes to the computer environment from the user Troubleshooting Windows-specific printing problems Print spool is stalled Incorrect/incompatible driver for print Incorrect parameter Other Common problems General Protection Faults Illegal operation Invalid working directory System lock up Option (Sound card, modem, input device) or will not function Application will not start or load Cannot log on to network (option NIC not functioning) TSR (Terminate Stay Resident) programs and virus Applications dont install Network connection Viruses and virus types What they are Source
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The PC Guide Tip Jar. Visa/MC/Paypal accepted. View over 750 of my fine art photos any time for free at DesktopScenes.com! [ The PC Guide | Systems and Components Reference Guide | Motherboard and System Devices | System BIOS | BIOS System Boot Operations ] System Boot Sequence
The system BIOS is what starts the computer running when you turn it on. The following are the steps that a typical boot sequence involves. Of course this will vary by the manufacturer of your hardware, BIOS, etc., and especially by what peripherals you have in the PC. Here is what generally happens when you turn on your system power: The internal power supply turns on and initializes. The power supply takes some time until it can generate reliable power for the rest of the computer, and having it turn on prematurely could potentially lead to damage. Therefore, the chipset will generate a reset signal to the processor (the same as if you held the reset button down for a while on your case) until it receives the Power Good signal from the power supply. When the reset button is released, the processor will be ready to start executing. When the processor first starts up, it is suffering from amnesia; there is nothing at all in the memory to execute. Of course processor makers know this will happen, so they pre-program the processor to always look at the same place in the system BIOS ROM for the start of the BIOS boot program. This is normally location FFFF0h, right at the end of the system memory. They put it there so that the size of the ROM can be changed without creating compatibility problems. Since there are only 16 bytes left from there to the end of conventional memory, this location just contains a "jump" instruction telling the processor where to go to find the real BIOS startup program. The BIOS performs the power-on self test (POST). If there are any fatal errors, the boot process stops. POST beep codes can be found in this area of the Troubleshooting Expert. The BIOS looks for the video card. In particular, it looks for the video card's built in BIOS program and runs it. This BIOS is normally found at location C000h in memory. The system BIOS executes the video card BIOS, which initializes the video card. Most modern cards will display information on the screen about the video card. (This is why on a modern PC you usually see something on the screen about the video card before you see the messages from the system BIOS itself). The BIOS then looks for