Dell PowerEdge 400SC Systems Installation and Troubleshooting Guide
Front-Panel Features and Indicators
The system, applications, and operating systems can identify problems and alert you to them. Any of the following can indicate when the system is not operating properly:
This section describes each type of message, lists the possible causes, and provides steps to resolve any problems indicated by a message. The system indicators and features are illustrated in this section.
Figure 2-1 shows the front-panel features and indicators of the system. Table 2-2 describes these features and indicators.
Figure 2-1. Front-Panel Features and Indicators
Table 2-1. Front-Panel Features and Indicators
Indicator or Feature |
Description |
---|---|
Flashes when the diskette drive is reading or writing data to a diskette. | |
Flashes when the hard drives are reading or writing data to the hard drives. The light might also be on when a device such as the CD drive is operating. | |
The power indicator blinks or remains solid to indicate different states. To exit from a power-saving state, briefly press the power button or click or move the mouse. | |
Press this button to turn the system on or off. NOTICE: Ensure that the voltage selection switch on the power supply is set to the appropriate voltage before turning on the power. See Figure 2-3 for the location of the switch. |
Table 2-2. Front-Panel Indicator Codes
Power Indicator |
Hard-Drive Indicator |
Causes |
Corrective Actions |
---|---|---|---|
Press the power button, move the mouse, or press a key on the keyboard to wake the system. | |||
Check the diagnostic indicators to see if the specific problem is identified. See Table 2-4. | |||
The system diagnostics is running a test, or a device on the system board may be faulty or incorrectly installed. | If the system diagnostics is running, allow the testing to complete. Check the diagnostic lights to see if the specific problem is identified. See "Troubleshooting the System Board" in "Troubleshooting Your System." If the system does not boot, see "Getting Help" for technical assistance. | ||
Check the diagnostic lights to see if the specific problem is identified. See "Troubleshooting the Power Supply" and "Troubleshooting the System Board" in "Troubleshooting Your System." | |||
Check the diagnostic lights to see if the specific problem is identified. See "Troubleshooting the System Board" in "Troubleshooting Your System." | |||
See "System Beep Codes" for instructions on identifying the beep code. Also, check the diagnostic lights to see if the specific problem is identified. See Table 2-4. | |||
The monitor or the video card may be faulty or incorrectly installed. | Check the diagnostic lights to see if the specific problem is identified. See "Troubleshooting the Video Subsystem" in "Troubleshooting Your System." | ||
Solid green, no beep code, and the system locks up during POST | Check the diagnostic lights to see if the specific problem is identified. See Table 2-4. If the problem is not identified, see "Getting Help" for technical assistance. |
![]() |
NOTICE: To help avoid damaging your system, be sure the voltage selection switch on the power supply is set for the voltage that most closely matches the AC power available in your location. Also be sure that your monitor and attached devices are electrically rated to operate with the power available in your location. See Figure 2-3 for the location of the voltage selection switch. |
Figure 2-2 shows the location and indictors of the NIC, and Figure 2-3 shows the back-panel indicators and features. Table 2-3 describes the NIC indicators and Table 2-4 details the conditions associated with the diagnostic indicator codes.
Figure 2-2. NIC LED Indicators
Figure 2-3. Back-Panel Features
Table 2-4. Diagnostic Indicator Codes
Code |
Causes |
Corrective Action |
---|---|---|
| Reinstall the processor (see "Processor" in "Installing System Components") and restart the system. | |
| Memory modules are detected, but a memory failure has occurred. | Remove and reinstall all memory modules. See "System Memory" in "Installing System Components." Ensure that all the connector tabs are locked. For optimal performance, install the memory modules in pairs (1 and 2, 3 and 4). |
| Determine if a conflict exists by removing a card (not the video card) and restarting the system. See "Expansion Cards" in "Installing System Components." If the problem persists, reinstall the card that you removed, remove a different card, and restart the system. Repeat this process for each card. If the system starts normally, troubleshoot the last card you removed from the system for resource conflicts. See "IRQ Assignment Conflicts " in "Finding Software Solutions." If the problem persists, see "Getting Help." | |
| Reinstall the video card (see "Expansion Cards" in "Installing System Components") and restart the system. If the problem still exists, install a video card that you know works and restart the system. If the problem persists, see "Getting Help." | |
| Check all power and data cable connections, and restart the system. | |
| Check cable connections, reinstall all USB devices, and restart the system. | |
| Remove and reinstall all memory modules. See "System Memory" in "Installing System Components." For optimal performance, install the memory modules in pairs (1 and 2, 3 and 4). | |
| Perform the procedures in "Troubleshooting the System Board" in "Troubleshooting Your System." If the problem persists, see "Getting Help." | |
| Memory modules are detected, but a memory configuration or compatibility error exists. | Ensure that there are no special memory module placement requirements. See "System Memory" in "Installing System Components." Verify that the memory modules that you are installing are compatible with your system. See "System Memory" in "Installing System Components." Reinstall the memory modules and restart the system. If the problem persists, see "Getting Help." |
| A possible system board resource and/or hardware failure has occurred. | Perform the procedure in "Troubleshooting the System Board" in "Troubleshooting Your System" and see "IRQ Assignment Conflicts" in "Finding Software Solutions." If the problem persists, see "Getting Help." |
| Determine if a conflict exists by removing a card (not the video card) and restarting the system. See "Expansion Cards" in "Installing System Components." If the problem persists, reinstall the card that you removed, remove a different card, and restart the system. Repeat this process for each card. If the system starts normally, troubleshoot the last card you removed from the system for resource conflicts. See "IRQ Assignment Conflicts " in "Finding Software Solutions." If the problem persists, see "Getting Help." | |
| Ensure that the cables are properly connected from the diskette drive, hard drive, CD drive, and DVD drive to the system board. If the problem persists, see "Getting Help." | |
| ||
System messages appear on the screen to notify you of a possible problem with the system. Table 2-5 lists the system messages that can occur and the probable cause and corrective action for each message.
![]() |
NOTE: If you receive a system message that is not listed in Table 2-5, check the documentation for the application that is running when the message appears or the operating system's documentation for an explanation of the message and recommended action. |
Message |
Causes |
Corrective Actions |
---|---|---|
A filename cannot
contain any of the
following characters: | ||
A required .DLL file was not found | The program that you are trying to open is missing an essential file. | Remove and then reinstall the program. See the program documentation for installation instructions. |
Alert! CPU Fan Not Detected | The processor cooling fan is not installed, has failed, or is not properly connected to the system board. | Ensure that the cooling fan is properly installed and working. See "Processor Cooling Shroud and Fan" in "Installing System Components." Also, ensure that the processor airflow shroud is properly installed. |
Alert! OS Install Mode enabled. Amount of available memory limited to 256MB | The OS Install Mode option in the System Setup program is set to On. This limits the amount of available memory to 256 MB because some operating systems will not complete installation with more than 2 GB of system memory. | After the operating system is installed, enter the System Setup program and set the OS Install Mode option to Off. See your User's Guide for details. |
Alert! Previous attempts at booting this system have failed at checkpoint [nnnn ]. For help in resolving this problem, please note this checkpoint and contact Dell Technical Support | The system failed to complete the boot routine three consecutive times for the same error. | See "Getting Help." |
Alert! Previous Fan Failures | Ensure that nothing is blocking the airflow vents and that all fans are properly installed and operating correctly. | |
Alert! Previous Processor Thermal Failure | Ensure that nothing is blocking the airflow vents and that all fans are properly installed and operating correctly. Also, ensure that the processor heat sink is properly installed. See "Processor" in "Installing System Components." | |
Alert! Previous Shutdown Due to Thermal Event | The processor or hard drive overheated the last time the system was used. | Ensure that nothing is blocking the airflow vents and that all fans are working correctly. Also, ensure that the processor heat sink is properly installed. |
Alert! Previous Voltage Failure | Voltage used by the system either exceeded or fell below acceptable thresholds. | See "Troubleshooting the System Battery" and "Troubleshooting the System Board" in "Troubleshooting Your System." |
Alert! System Battery Voltage is Low | See "Troubleshooting the System Battery" in "Troubleshooting Your System." | |
Alert! Uncorrectable Memory Error Previously Detected... Address xxxxxxxxh | One or more memory modules might be improperly seated, or faulty or the system board may be faulty. | See "Troubleshooting System Memory" and "Troubleshooting the System Board" in "Troubleshooting Your System." |
Attachment failed to respond | The diskette or hard-drive controller cannot send data to the associated drive. | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." |
Bad command or file name | Ensure that you have spelled the command correctly, have put spaces in the proper place, and have used the correct pathname. | |
Bad error-correction code (ECC) on disk read | The diskette or hard-drive controller detected an uncorrectable read error. | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." |
Controller has failed | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." | |
Data error | For the operating system, run the appropriate utility to check the file structure of the diskette drive or hard drive. See your operating system documentation for information on running these utilities. | |
Decreasing available memory | One or more memory modules might be faulty or improperly seated. | Reinstall the memory modules and, if necessary, replace them. See "System Memory" in "Installing System Components." See "Troubleshooting System Memory" in "Troubleshooting Your System." |
Diskette drive 0 seek failure | A cable might be loose or the system configuration information might not match the hardware configuration. | See "Troubleshooting a Diskette Drive" in "Troubleshooting Your System." |
Diskette read failure | If the diskette-drive indicator turns on, try a different disk. See "Troubleshooting a Diskette Drive" in "Troubleshooting Your System." | |
Diskette subsystem reset failed | Run the system diagnostics. See "Running the System Diagnostics." | |
Diskette write protected | ||
Drive not ready | ||
Gate A20 failure | See "Getting Help." | |
General failure | This message is usually followed by specific information. Take the appropriate action to resolve the problem. | |
Hard-disk configuration
error | Run the system diagnostics. See "Running the System Diagnostics." See "Troubleshooting IDE or SATA Hard Drives" or "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." | |
Insert bootable media | The operating system is trying to boot from a nonbootable diskette or CD. | |
Invalid configuration information - please run SETUP program | The system configuration information does not match the hardware configuration. | Enter the System Setup program and correct the system configuration information. See your User's Guide for details. |
Keyboard Controller Failure KeyBoard Stuck Key Failure Keyboard failure | A cable or connector might be loose, or the keyboard or keyboard/mouse controller might be faulty. | See "Troubleshooting the Keyboard" in "Troubleshooting Your System." |
Memory address line failure at address, read value expecting value | Reinstall the memory modules and, if necessary, replace them. See "Troubleshooting System Memory" in "Troubleshooting Your System." | |
Memory allocation error | The software you are attempting to run is conflicting with the operating system, another program, or a utility. | Turn off the system, wait 30 seconds, restart the system, and then try to run the program again. If the error message appears again, see the software documentation for additional troubleshooting suggestions. |
Memory data line failure at address, read value expecting value Memory double word logic failure at address, read value expecting value Memory odd/even logic failure at address, read value expecting value Memory write/read failure at address, read value expecting value | Reinstall the memory modules and, if necessary, replace them. See "Troubleshooting System Memory" in "Troubleshooting Your System." | |
Memory size in CMOS invalid | The amount of memory recorded in the system configuration information does not match the memory installed in the system. | Restart the system. If the error message appears again, see "Troubleshooting System Memory" in "Troubleshooting Your System." If the problem persists, see "Getting Help." |
No boot device available | If the diskette drive is your boot device, ensure that a bootable disk is in the drive. If the hard drive is your boot device, ensure that the hard drive is installed, properly seated, and partitioned as a boot device. Enter the System Setup program and verify the boot sequence information. See your User's Guide for details. | |
No boot sector on hard- disk drive | The system configuration information in the System Setup program might be incorrect. | Enter the System Setup program and verify the system configuration information for the hard drive. See your User's Guide for details. If the message continues to appear after verifying the information in the System Setup program, the operating system might have been corrupted. Reinstall the operating system. See your operating system documentation for reinstallation information. |
No timer tick interrupt | Run the system diagnostics. See "Running the System Diagnostics." | |
Non-system disk or disk error | The diskette in the diskette drive or your hard drive does not have a bootable operating system installed on it. | Replace the diskette with one that has a bootable operating system or remove the diskette, and then restart the system. |
Not a boot diskette | The operating system is trying to boot from a diskette that does not have a bootable operating system installed on it. | |
Not enough memory or resources. Close some programs and try again | Close all windows and open the program that you want to use. In some cases, you might have to restart your system to restore system resources. If so, try opening the program that you want to use first | |
Operating system not found | See "Getting Help." | |
Plug and Play Configuration Error | The system encountered a problem while trying to configure one or more cards. | Turn your system off, unplug it from the electrical outlet, and remove all but one of the cards. See "Expansion Cards" in "Installing System Components." Plug in your system and reboot it. If the message reappears, the installed card might be malfunctioning. If the message does not reappear, turn off the system and reinsert one of the other cards. See "Expansion Cards." Repeat this process until you identify which card is malfunctioning. |
Read fault | The operating system cannot read from the diskette or hard drive, the system could not find a particular sector on the disk, or the requested sector is defective. | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." |
Requested sector not found | The operating system cannot read from the diskette or hard drive, the system could not find a particular sector on the disk, or the requested sector is defective. | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." |
Reset failed | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." | |
Sector not found Seek error | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." | |
Shutdown failure | Run the system diagnostics. See "Running the System Diagnostics." | |
The file being copied is too large for the destination drive | The file that you are trying to copy is too large to fit on the disk. | Try copying the file to a blank diskette or using a larger capacity disk. |
Time-of-day clock stopped | See "Troubleshooting the System Battery" in "Troubleshooting Your System." | |
Time-of-day not set | The time or date stored in the System Setup program does not match the system clock. | Enter the System Setup program and correct the Date and Time options. See your User's Guide for details. If the problem persists, see "Troubleshooting the System Battery" in "Troubleshooting Your System." |
Timer chip counter 2 failed | Run the system diagnostics. See "Running the System Diagnostics." | |
Unexpected interrupt in protected mode | The keyboard controller might be malfunctioning, or a memory module might be loose. | Ensure that all memory modules are properly installed. See "System Memory" in "Installing System Components." If the problem persists, replace the memory module(s). If the problem persists, see "Getting Help." |
WARNING: Dell's Disk Monitoring System has detected that drive [0/1] on the [primary/secondary] EIDE controller is operating outside of normal specifications. It is advisable to immediately back up your data and replace your hard drive by calling your support desk or Dell | During initial start-up, the drive detected possible error conditions. | When your system finishes booting, immediately back up your data and replace your hard drive. See "Hard Drives" in "Installing drives." If no replacement hard drive is immediately available and the drive is not the only bootable drive, enter the System Setup program and change the appropriate drive setting to None. See your User's Guide for details. Then remove the hard drive from the system. |
Write fault | The operating system cannot write to the diskette drive or hard drive. | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." |
Write fault on selected drive | The operating system cannot write to the diskette drive or hard drive. | See "Troubleshooting a Diskette Drive" or "Troubleshooting IDE or SATA Hard Drives" and "Troubleshooting SCSI Hard Drives" in "Troubleshooting Your System." |
x:\ is not accessible. The device is not ready |
If an error that cannot be reported on the screen occurs during POST, the system may emit a series of beeps that identifies the problem.
![]() |
NOTE: If the system boots without a keyboard, mouse, or monitor attached, the system does not issue beep codes related to those peripherals. |
If a beep code is emitted, write down the series of beeps and then look it up in Table 2-6. If you are unable to resolve the problem by looking up the meaning of the beep code, use system diagnostics to identify the possible cause. If you are still unable to resolve the problem, see "Getting Help."
Table 2-6. Server Module Beep Codes
Code |
Cause |
Corrective Action |
---|---|---|
See "Troubleshooting the Processor" in "Troubleshooting Your System." | ||
See "Getting Help." | ||
See "Getting Help." | ||
See "Troubleshooting System Memory" in "Troubleshooting Your System." | ||
See "Getting Help." | ||
See "Troubleshooting an Expansion Card" in "Troubleshooting Your System." | ||
See "Troubleshooting System Memory" in "Troubleshooting Your System." | ||
No memory modules installed in the first memory module connector | Install a memory module in the first memory module connector. See "Installing a Memory Module" and "Memory Module Installation Guidelines" in "Installing System Components." | |
See "Getting Help." | ||
See "Troubleshooting System Memory" in "Troubleshooting Your System." | ||
See "Getting Help." | ||
See "Troubleshooting the Processor" in "Troubleshooting Your System." |
A warning message alerts you to a possible problem and prompts you to respond before the system continues a task. For example, before you format a diskette, a message will warn you that you may lose all data on the diskette. Warning messages usually interrupt the task and require you to respond by typing y (yes) or n (no).
![]() |
NOTE: Warning messages are generated by either the application or the operating system. For more information, see "Finding Software Solutions" and the documentation that accompanied the operating system or application. |
When you run system diagnostics, an error message may result. Diagnostic error messages are not covered in this section. Record the message on a copy of the Diagnostics Checklist in "Getting Help," and then follow the instructions in that section for obtaining technical assistance.
Systems management software generates alert messages for your system. Alert messages include information, status, warning, and failure messages for drive, temperature, fan, and power conditions. For more information, see the systems management software documentation.