SunFire v440&Memory error

I has error during boot process:NOTICE: CPU 1 has 1024/2048 MB of memory disabledWhat it's mean? Memory microchip broken?
[143 byte] By [garlica] at [2007-11-26 14:32:02]
# 1
Can you give more details of system configuration and any recent changes that were made. It sounds like ASR may have disabled the memory bank because of a faulty DIMM. Have you got a service ticket yet?
m-lennona at 2007-7-8 2:27:20 > top of Java-index,Sun Hardware,Servers - General Discussion...