Solving Problems 191
ALERT! MEMORY POPULATION MISMATCH. DIMM SLOT 1 AND
DIMM SLOT 3 ARE DISABLED AND PERFORMANCE WILL BE
DEGRADED — The memory module connectors are not populated in matched
pairs or there is a defective memory module in the computer. Ensure that
memory modules of identical size, type, speed, and number of chips are installed
in memory module connectors 1 and 2 and memory modules of identical size,
type, speed, and number of chips are installed in memory module connectors 3
and 4 (if used). See .
ALERT! OPERATING IN DEBUG MODE. PLEASE POPULATE MEMORY
IN PAIRS FOR NORMAL OPERATION — This message appears when one
memory module is installed in memory module connector 4. This is a
troubleshooting mode that allows you to isolate a defective memory module, see
"Memory Problems."
ALERT! OS INSTALL MODE ENABLED — The OS Install Mode in system
setup is set to On, which limits the amount of memory to 256 MB because some
operating systems will not complete installation with more than 2 GB of memory.
After you have installed the operating system, enter system setup and set the OS
Install Mode to Off.
ALERT! POWER SUPPLY FAN FAILURE — The power supply fan has failed
or is blocked. Ensure that the power supply airflow vents are not blocked.
ALERT! PREVIOUS ATTEMPTS AT BOOTING THIS SYSTEM HAVE
F
AILED AT CHECKPOINT [
nnnn
]. FOR HELP IN RESOLVING THIS
PROBLEM, PLEASE NOTE THIS CHECKPOINT AND CONTACT DELL
TECHNICAL SUPPORT — The computer failed to complete the boot routine
three consecutive times for the same error. see "Contacting Dell" and report the
checkpoint code (nnnn) to the support technician.
ALERT! PREVIOUS FAN FAILURES — The fan caused an error last time
you used the computer. Ensure that nothing is blocking the airflow vents and
that all the fans are properly installed and operating correctly.
ALERT! PREVIOUS PROCESSOR THERMAL FAILURE — The
microprocessor overheated the last time you used the computer. Ensure that
nothing is blocking the airflow vents and that all the fans are properly installed
and operating correctly. Also, ensure that the microprocessor heat sink is properly
installed.
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