Dell YH242 For memory module/connector, Placement exist see Memory on, Software and Hardware

Light Pattern	Problem Description	Suggested Resolution
	No memory modules are detected.	• If two or more memory modules are
			installed, remove the modules (see
			"Removing Memory" on page 85), then
			reinstall one module (see "Installing
			Memory" on page 83) and restart the
			computer. If the computer starts
			normally, continue to install additional
			modules (one at a time) until you have
			identified a faulty module or
			reinstalled all modules without error.
		•	If available, install properly working
			memory of the same type into your
			computer (see "Installing Memory" on
			page 83).
		• If the problem persists, contact Dell
			(see "Contacting Dell" on page 137).
	Memory modules are detected, but a	• Ensure that no special requirements
	memory configuration or compatibility		for memory module/connector
	error has occurred.		placement exist (see "Memory" on
			page 82).
		• Ensure that the memory you are using
			is supported by your computer (see
			"Memory" on page 123).
		• If the problem persists, contact Dell
			(see "Contacting Dell" on page 137).
	A possible expansion card failure has	1	Determine if a conflict exists by
	occurred.		removing a card (not a graphics card)
			and restarting the computer (see
			"Cards" on page 86).
		2	If the problem persists, reinstall the
			card that you removed, then remove a
			different card and restart the computer.
		3	Repeat this process for each card
			installed. If the computer starts
			normally, troubleshoot the last card
			removed from the computer for
			resource conflicts (see "Resolving
			Software and Hardware
			Incompatibilities" on page 72).
		4	If the problem persists, contact Dell
			(see "Contacting Dell" on page 137).

Troubleshooting Tools

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