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Service Hints & Tips

Document ID: GSMH-3AKD33

TP 365C/CS/CD/CSD/E/ED - Memory Checkout & Flash Memory

Applicable to: World-Wide

Memory Checkout

See the following table for the available memory size of each card.

System Board	8MB Memory Board	Optional SO-DIMM	Extended Memory	Switch Setting
640KB	8MB	0	7168KB	1,2,3,4 OFF
		4	11264KB	1,2,3,4 OFF
		16	23552KB	2 ON 1,3,4 OFF
640KB	16MB	0	15360KB	1,2,3,4 OFF
		4	19456KB	1,2,3,4 OFF
		16	31744KB	2 ON 1,3,4 OFF

Note : Refer to 'Memory Board Switch Settings— for Memory Board Switch location.

Memory errors might 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.

Memory Error Notes
Ignore any references to parity errors.
Remove any installed PCMCIA memory cards.

1. Make sure that any memory options are fully installed into their connectors. A loose connection can cause an error.
2. Run the diagnostics.
3. If memory problems occur intermittently, use the loop option to repeat the test.
4. Single failures can occur from a variety of reasons that have nothing to do with a hardware defect such as electrostatic discharge or software errors. FRU replacement should only be considered when a recurring problems exits.

Flash Memory : BIOS, System setup programs, and diagnostic tests are stored in flash memory.

Flash Memory Update : A flash memory update is required for new versions.

When Updating Flash Memory
During the flash update do not:
Power-off the computer.
Disconnect the AC Adapter.
Remove the battery.
Lift the keyboard.
Press any key.

Attention
On certain systems, updating flash memory can reset all customers configuration settings to the default values. The following steps bypass the CONFIG.SYS and AUTOEXEC.BAT files, so the customer~s configuration setting are not reset to the default values.

To update the flash memory:
1. Power-off the computer.
2. Install the battery pack and connect the AC Adapter.
3. Insert the update diskette in drive A.
4. Power-on the computer.
5. When the message 'Starting PC DOS— appears, press F5 to bypass the CONFIG.SYS and AUTOEXEC.BAT.
6. At the prompt, select Country Language then press Enter.
7. Follow the instructions on the screen.

	Search Keywords
	Hint Category	Memory
	Date Created	22-07-96
	Last Updated	19-08-98
	Revision Date	18-08-99
	Brand	IBM ThinkPad
	Product Family	ThinkPad 365C/CS, ThinkPad 365CD/CSD, ThinkPad 365E/ED
	Machine Type	2625
	Model	Various
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes