Dell PowerEdge R810 Owner's Manual page 48

Message
MemBIST timeout:
DIMM <x> Lockstep
Pair DIMM <x&y>
disabled. Please
replace the
DIMM(s) or remove
the lockstep
pair.
MemBIST error:
DIMM <x> Lockstep
Pair DIMM <x&y>
disabled. Please
replace the
DIMM(s) or remove
the lockstep
pair.
DDR training
error: DIMM <x>
Lockstep Pair
DIMM <x&y>
disabled. Please
replace the DIMM
or remove the
lockstep pair.
48
About Your System
Causes
The memory modules are not
properly seated.
The memory module
connector may be exposed to
dust.
Faulty memory module.
Corrective Actions
Replace or reseat the
memory module(s). See
"Removing Memory
Modules" on page 107 and
"Installing Memory Modules"
on page 105.
Ensure that the memory
module connectors are clean.