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5.502 bytes |
Service Hints & Tips |
Document ID: GSMH-3BKLAX |
TP 755CE/CSE/CV/CX - Memory Checkout
Applicable to: World-Wide
Memory Checkout:
One of two types of memory cards can be used, IC DRAM card or DIMM card. See the following table for the total memory size available when they are installed.
|
IC DRAM |
Displayed Value |
|
0 MB |
7808 KB |
|
2 MB |
9856 KB |
|
4 MB |
11904 KB |
|
8 MB |
16000 KB |
|
16 MB |
24192 KB |
|
DIMM |
Displayed Value |
|
0 MB |
7808 KB |
|
4 MB |
11904 KB |
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8 MB |
16000 KB |
|
12 MB |
20096 KB |
|
16 MB |
24192 KB |
|
20 MB |
28288 KB |
|
24 MB |
32384 KB |
|
32 MB |
40576 KB |
Memory errors can stop system operations, show error messages on the screen, or hang the system. The computer detects memory parity errors but does not correct them.
Use the following procedure to isolate memory problems.
Notes:
a. Except Model 755CX, installing a non-parity memory card causes memory errors. Before you go to the next procedure, check whether or not the memory card use parity or non-parity. If the non-parity memory card is installed, disable the parity check on the Easy-Setup configuration screen.
b. Make sure that the memory card is fully installed into the connector. A loose connection can cause an error.
1. Power-off the computer and remove the IC DRAM card, or DIMM card from its slot (if installed).
2. Press and hold the F1 key; then power-on the computer. Hold the F1 key down until the Easy-Setup screen appears.
3. Select Test and press enter.
4. Select Memory and press enter to run the memory test on base memory. If an error appears, replace the memory card.
5. Power-off the computer and reinstall the IC DRAM card or the DIMM card; then power-on the computer. Verify the memory size; then test the memory. If an error appears, replace the IC DRAM card or the DIMM card.
If memory problems occur intermittently, use the loop option to repeat the test. When the test detects an error, an error log is printed on the printer connected to the parallel port. See "Error Log" for more information.
System Programs in Flash Memory: System setup programs and diagnostic tests are stored in Flash memory.
Flash Memory (BIOS) Update:
A flash memory update is required for the following conditions:
- New versions of system programs.
- New feature or options are added.
When Updating Flash Memory:
Do not power-off the computer., disconnect the Vac power, or remove the battery. during the Flash update. The system board will have to be replaced if the update is interrupted.
Updating Flash memory also resets all of the customer~s configuration settings to the default values.
To update the Flash memory, perform the following steps:
1. Get the appropriate diskette which contains the update.
2. Insert the System Program Service Diskette into driveA and power-on the computer.
3. Select Update system programs from the menu.
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Search Keywords |
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Hint Category |
Memory | |
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Date Created |
19-11-96 | |
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Last Updated |
01-04-98 | |
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Revision Date |
13-03-99 | |
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Brand |
IBM ThinkPad | |
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Product Family |
ThinkPad 755CE/CSE, ThinkPad 755CX, ThinkPad 755CV, ThinkPad 755CD, ThinkPad 755CDV | |
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Machine Type |
9545 | |
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Model |
Various | |
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TypeModel |
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Retain Tip (if applicable) |
N/A | |
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Reverse Doclinks |