Lenovo NetVista Hardware Maintenence Manual for Netvista 6838 and 6848 systems - Page 21

RIMM diagnostic approach, Recovering your operating system and preinstalled software

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RIMM sizes of 64 MB, 128 MB, 256 MB, and 512 MB are acceptable. RIMM sockets, within each memory channel, can be filled in any order. However, both memory channels must be populated the same. ECC or non-ECC, RAMBUS dynamic random access memory (RDRAM) are supported. If ECC and non-ECC are installed together, all memory will function as non-ECC. Note: Mixed RIMM speeds will run at the lower speed. RIMM diagnostic approach Identify any Beep or POST codes. See Chapter 7, "Symptom-to-FRU index", on page 47. Use the IBM PC Enhanced Diagnostics program to run memory tests. See "IBM Enhanced Diagnostics" on page 8. Procedures to determine memory errors 1. If a memory error occurs, and the system is operational, run memory diagnostics. 2. If a memory error occurs, and the system is not operational: a. Replace one RIMM module at a time until the system comes up. Note: All unused RIMM sockets must have a C-RIMM installed. Both memory channels must be populated the same. b. Run memory diagnostics. c. Replace the other RIMMs and run diagnostics again to identify the failing RIMM. Procedures to determine memory errors: 1. If a memory error occurs, and the system is operational, run memory diagnostics. 2. If a memory error occurs, and the system is not operational: a. Replace one RIMM module at a time until the system comes up. Note: All unused RIMM sockets must have a C-RIMM installed. b. Run memory diagnostics. c. Install the other RIMM and run diagnostics again to identify the failing RIMM. Recovering your operating system and preinstalled software This section contains instructions for recovering BIOS, device drivers, operating system, and other support software. Notes: 1. The Product Recovery program is provided on your computer to assist you with recovery operations. Important: The Product Recovery program is preinstalled on the hard disk drive that comes with your IBM computer and is designed to be hidden from view to protect the program from accidental damage. Chapter 3. Diagnostics 13

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RIMM sizes of 64 MB, 128 MB, 256 MB, and 512 MB are acceptable. RIMM sockets,
within each memory channel, can be filled in any order. However, both memory
channels must be populated the same. ECC or non-ECC, RAMBUS dynamic
random access memory (RDRAM) are supported. If ECC and non-ECC are
installed together, all memory will function as non-ECC.
Note:
Mixed RIMM speeds will run at the lower speed.
RIMM diagnostic approach
Identify any Beep or POST codes. See Chapter 7, “Symptom-to-FRU index”, on
page 47.
Use the IBM PC Enhanced Diagnostics program to run memory tests. See “IBM
Enhanced Diagnostics” on page 8.
Procedures to determine memory errors
1.
If a memory error occurs, and the system is operational, run memory
diagnostics.
2.
If a memory error occurs, and the system is not operational:
a.
Replace one RIMM module at a time until the system comes up.
Note:
All unused RIMM sockets must have a C-RIMM installed. Both memory channels
must be populated the same.
b.
Run memory diagnostics.
c.
Replace the other RIMMs and run diagnostics again to identify the failing
RIMM.
Procedures to determine memory errors:
1.
If a memory error occurs, and the system is operational, run memory
diagnostics.
2.
If a memory error occurs, and the system is not operational:
a.
Replace one RIMM module at a time until the system comes up.
Note:
All unused RIMM sockets must have a C-RIMM installed.
b.
Run memory diagnostics.
c.
Install the other RIMM and run diagnostics again to identify the failing
RIMM.
Recovering your operating system and preinstalled software
This section contains instructions for recovering BIOS, device drivers, operating
system, and other support software.
Notes:
1.
The Product Recovery program is provided on your computer to assist you
with recovery operations.
Important:
The Product Recovery program is preinstalled on the hard disk
drive that comes with your IBM computer and is designed to be hidden from
view to protect the program from accidental damage.
Chapter 3. Diagnostics
13