Sun Microsystems Enterprise 250 Owner's Manual page 278

themselves to identify the faulty supply. The power supply LEDs will indicate any
problem with the AC input or DC output. See "Power Supply LEDs" on page 245 for
more information about the LEDs.
DIMM Failure
SunVTS and POST diagnostics can report memory errors encountered during
program execution. Memory error messages typically indicate the DIMM location
number ("U" number) of the failing module.
Use the following diagram to identify the location of a failing memory module from
its U number:
D
C
B
A
After you have identified the defective DIMM, remove it according to the
instructions in "How to Remove a Memory Module" on page 77. Install the
replacement DIMM according to the directions in "How to Install a
Memory Module" on page 79.
260 Sun Enterprise 250 Server Owner's Guide • June 1998
Top of system
U1004
U0904
U0804
U0704
U1003
U0903
U0803
U0703
U1002
U0902
U0802
U0702
U1001
U0901
U0801
U0701