Filter
Top Products
Chapter 11: Troubleshooting
134
“First row test” - displayed on the upper LCD line
“0064 MB” - displayed on the lower LCD line
“ALL DIMM MAP OUT” - displayed on the upper LCD line
User Action
1. Replace the first row of DIMMs. On repacing the DIMMs, make sure the size and HP part
number match.
2. Clear CMOS via the front panel or via clear CMOS jumper in order to clear previous defective
DIMM history.
3. Power on the system.
Error Logging
The defective row/DIMM(s) found during this test case cannot be logged to the SEL or reported on
screen.
Base Memory Test
Description
The Base Memory Test will take effect after the completion of the first row test with no errors, or
with single bit errors, and if the system contains more memory to test. The base memory test will test
the first 2 GB of memory. If this memory is found to be defective, the BIOS will detect the defective
memory row(s), write these rows into CMOS for further processing, and display an appropriate error
message on the front panel LCD. The BIOS will then force a reset of the system. During the next
boot, this written history will be read from CMOS and the defective rows will be mapped out of the
data path. The BIOS does not differentiate between SBEs and MBEs. In both cases the system will
reset and map out the defective row, upon detection.
Combining the memory errors encountered in the first row test with base memory test leads to several
possible cases. Some failing cases are described below.
Case 1
The system is populated with more than one row of memory and the first row memory test encounters
a SBE (Single Bit Error). In this case, the BIOS will write these rows into CMOS history and map
out the first row of DIMMs and continues with base memory testing. If the base memory test does
not encounter any memory errors, then the system will continue to boot.
User Notification
The first row that contains the defective DIMM will be mapped out and the system will continue to
boot with the remaining memory. An error message will be displayed to video for the mapped out
defect DIMM.
“First row test” - displayed on the upper LCD line during first row test
“0064MB” - displayed on the lower LCD line during first row test
“Base memory test” - displayed on the upper LCD line and sometimes this message can go
by very fast
Later an error message for the defective DIMM will be displayed on the video as follows:
8C9X: "DIMMS mapped out: Upper Board, n-n+3".