Tip & How-To about Computers & Internet

Monitor self test

To make sure that the monitor is working fine, just unplug it from the computer. make sure that monitor is plugged in a known good wall outlet and turned on. there should be self test feature check on it that scolls around the monitor screen. for no dell branded monitor there should be a message like No signal.

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Dell e137fp monitor flashing green...


Below you will find my recommendations for troubleshooting this issue:

1. Reseat the power cord and verify a good power source.

To reseat the power cord, follow the steps below:

1.1 Power down the system.
1.2 Unplug the power cord.
1.3 Wait approximately one minute.
1.4 Reseat the power cord.
1.5 Verify that the power cord is plugged directly into a known good power outlet.

2. Verify that the monitor is receiving power from a known good outlet and bypass any power strips.

To test the power outlet, perform the following steps:

2.1 Unplug the monitor power cable from the power outlet.
2.2 Plug in a different device, and verify that the device is operational.
2.3 If there is no power try another outlet. Remove any power strips and try plugging directly into the main power outlet.

3. Verify the monitor is powered on and the power button is engaged.

Ensure that the monitor is powered on and that the power button is fully engaged. To do so, check the power LED on the front of the monitor; it should be lit.

NOTE: There are two types of power switches:
A mechanical switch characterized by a long travel. You have to push it further and you will hear an audible click.
An electrical switch that has a short travel and almost no click.

A lit monitor LED can be any of the following:

* Green
* Blinking green
* Yellow
* Blinking yellow
* A combination, such as alternating green and yellow

Any of these states indicate the monitor is receiving power and that you should proceed.

4. Swap power cables.

To try a known good power cable on the monitor, follow the instructions below:

4.1 Turn off a working monitor.
4.2 Unplug the cable from the back of the working monitor, and unplug the cable from the wall.
4.3 Unplug the cable from the monitor in question.
4.4 Plug in the cable that came from the working monitor.

5. Run the monitor self test.

To run the monitor self test, perform the following steps:

5.1 Power off both the computer and the monitor.
5.2 Unplug the video cable from the computer or video card.
5.3 Reseat the power cord to the monitor, ensuring it is plugged into a known-good outlet.
5.4 Power on the monitor.

NOTE: The monitor self test will move around on some monitor models. If the monitor self test moves, allow it to move to the affected areas of the monitor to check for the problem described.

If the Self test failed, it's possible that the monitor is faulty. Contact dell to check if it's still under warranty so they can replace it.

Jun 15, 2009 | Dell E173FP 17" LCD Flat Panel Monitor

1 Answer

E-machine was working fine last night got up and it turns on but the monitor says check cable or power but all is ok.Computer wont display anything, can anyone help?


Do a reset: Turn the computer and monitor off. Unplug the monitor video cable from the computer and unplug the monitor power cord from the wall outlet. Let it sit for 5 or 10 minutes. Plug everything back in, turn on the monitor, then start the computer. Sometimes that will work.
If you still have the same problem, try to borrow a known to be good monitor from somebody. If it works, then you know your monitor is bad.
It's also possible that your video circuitry is bad. If the monitor plugs straight into the motherboard (onboard video), then you'll need to purchase a video card and install it. Disable the onboard video first.

Feb 25, 2009 | E-Machines (T2958) PC Desktop

1 Answer

mag lt982s no green light no power at all


try testing it in another outlet a known good outlet if it powers on then your outlets bad if it doesnt means a bad cord or bad monitor

Feb 10, 2009 | Mag Innovision LT982s 19" Flat Panel LCD...

1 Answer

display problam


  1. Make sure that the monitor is turned on and has power. Make sure that the display's power cord is plugged into a working wall outlet, and that it's properly connected to the power adapter. (To check if the wall socket is working, plug in a lamp or other electrical device.)
  2. Check that all video cable connections to the computer video port and to the monitor are properly connected.
  3. Examine the pins on the video cable connector to make sure they are not bent or damaged in any way.
  4. Connect a known working display (if you have an extra one available). If you see video after doing so, replace your old display.
  5. Unplug the video cable and then turn on the monitor, check any message is showing in monitor if its shown means ur monitor is ok or else their is a problem in monitor..
  6. turn off the system and check the ram..
  7. Reset the computer...

Jan 28, 2009 | ASUS MB M3A78-EMH HDMI RT Motherboard

1 Answer

My monitor does not work.


try unplugging the monitor cable frm the back of the computer & make sure the monitor is connectd to a known good wall outlet.....chk if it shows any self test on the monitor......if it shows anything thn it is related to the port on the computer or the video card.....bt if it doesnt shw anything, u might hv to replace the monitor

May 17, 2008 | Dell 1503FP 15" LCD Monitor

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