Memory; Procedure 1 Test Program Check; Procedure 2 Connector Check And Replacement Check - Toshiba Satellite C850D Maintenance Manual

2 Troubleshooting

2.13 Memory

To check if the computer's Memory Module is defective or malfunctioning, follow the
troubleshooting procedures below as instructed.

Procedure 1 Test Program Check

Procedure 2 Connector Check and Replacement Check

Procedure 1 Test Program Check

Execute Memory Test Program available as part of the maintenance test program. This test
program checks the memory module. Insert the diagnostics bootable CD in the computer's
CD/DVD device, turn on the computer and run the test. See Chapter 3 for information on
how to perform the test. If any error is detected by the test, go to Procedure 2. If no error is
detected, Memory Module is functioning properly.

Procedure 2 Connector Check and Replacement Check

The memory module is connected to the system board. If the memory module malfunctions,
there may be a bad connection between Memory Module and System Board, or either might
be faulty. Disassemble the computer following the steps described in Chapter 4 and perform
the following checks:
Check 1 Make sure Memory Module has been firmly connected to the connector on
System Board. Also make sure the tape is not stuck to any part of Memory
Module and Memory Module is free of foreign matters.
Memory Module
And if the connector is disconnected, connect it firmly to the system board
and return to Procedure 1. If the tape is stuck to any part of memory, stick it
back to the specified point and if a foreign matter is found on memory, remove
it and then return to Procedure 1. If there is still an error, perform Check 2.
Check 2 Memory Module may be faulty. Replace it with a new one following the
steps described in Chapter 4. If Memory Module replaced is still not
functioning properly, perform Check 3.
Check 3 System Board may be defective. Replace System Board with a new one
following the steps described in Chapter 4. If the problem persists, , , ,
perform Check 4.
Check 4 CPU may be faulty. Disassemble the computer following the steps
described in Chapter 4 and replace CPU with a new one.
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System Board
Satellite/Satellite Pro/C850D/C855D/L850D/L855D Maintenance Manual

2.13 Memory

CPU