Dell 755 manual 348, Light Pattern Problem Description Suggested Resolution

Light Pattern	Problem Description	Suggested Resolution
	A possible floppy drive or hard drive failure has	Reseat all power and data cables.
	occurred.

A possible USB failure has occurred.

Reinstall all USB devices and check all cable connections.

No memory modules are detected.	• If two or more memory modules are
	installed, remove the modules (see
	"Removing Memory" on page 316), then
	reinstall one module (see "Installing
	Memory" on page 314) and restart the
	computer. If the computer starts normally,
	continue to install additional memory
	modules (one at a time) until you have
	identified a faulty module or reinstalled all
	modules without error.
	• If available, install working memory of the
	same type into your computer (see
	"Installing Memory" on page 314).
	• If the problem persists, contact Dell (see
	"Contacting Dell" on page 370).
Memory modules are detected, but a memory	• Ensure that no special requirements for
configuration or compatibility error has	memory module/connector placement exist
occurred.	(see "Memory" on page 313).
	• Ensure that the memory you are using is
	supported by your computer (see the
	"Specifications" section for your computer).
	• If the problem persists, contact Dell (see
	"Contacting Dell" on page 370).

348

Solving Problems