Lenovo 3719, 3821, 3822, 3823 manual Monitor problems

Monitor problems

Some Lenovo monitors have their own self-tests. If you suspect a problem with your monitor, see the documentation that comes with the monitor for instructions for testing and adjusting the monitor.

vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

vSee Chapter 8, “Parts Listing, TD200x Machine Types 3719, 3821, 3822, and 3823,” on page 237 to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).

vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.

Symptom	Action
Testing the monitor	1.	Make sure that the monitor cables are firmly connected.
	2.	Try using a different monitor on the server, or try using the monitor that is being
		tested on a different server.
	3.	Run the diagnostic programs. If the monitor passes the diagnostic programs,
		the problem might be a video device driver.
	4.	(Trained service technician only) Replace the system board.
The screen is blank.	1.	If the server is attached to a KVM switch, bypass the KVM switch to eliminate it
		as a possible cause of the problem: connect the monitor cable directly to the
		correct connector on the rear of the server.
	2.	Make sure that:
		v The server is turned on. If there is no power to the server, see “Power
		problems” on page 73.
		v The monitor cables are connected correctly.
		v The monitor is turned on and the brightness and contrast controls are
		adjusted correctly.
		v No POST errors are generated when the server is turned on.
	3.	Make sure that the correct server is controlling the monitor, if applicable.
	4.	See “Solving undetermined problems” on page 124.
The monitor works when you	1.	Make sure that:
turn on the server, but the
		v The application program is not setting a display mode that is higher than the
screen goes blank when you
		capability of the monitor.
start some application
		v You installed the necessary device drivers for the application.
programs.
	2.	Run video diagnostics (see “Running the diagnostic programs” on page 90).
		v If the server passes the video diagnostics, the video is good; see “Solving
		undetermined problems” on page 124.
		v (Trained service technician only) If the server fails the video diagnostics,
		replace the system board.

70ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual