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Computer powers up, but monitor shows a self test

Once i turn on the computer, I can hear it running, but the monitor flashes a rectangular box that is green/red/blue The green section displays "self Test G" Red section "Check your PC and signal cable" R and the blue section "Monitor is working" B

Any solutions

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  • Shadow Gilbert
    Shadow Gilbert May 11, 2010

    Doesnt the computer beep multiple times on startup? Also are you using an after market graphics card? (A Card that plugs into a PCI, AGP or PCI-E slot on the motherboard)

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Check the cables first, reset the monitor to factory settings. Check also your video card

Posted on Feb 11, 2009

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  • Gateway Master
  • 1,314 Answers

Your video output is bad. Either the video card, or the onboard video built into the computer. You need to swap out the card or add a card to bypass the built in video port on your computer.

Thanks and please take a moment to rate as fixya.

Posted on Feb 11, 2009

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Apple has a variety of 'beeps' (sound) and 'blinks' (lights) for both computers and monitors. Your 3 beeps (wild guessing here) could be as noted in this link below ... which will also steer you in the right direction. Note too, that blinking lights - can have a pattern (3 blinks: short-short-long, for example). These also have specific diagnostic meanings and you might make a note before searching.

Link to some ref on blinks and beeps is here (a paste follows this note too):

https://discussions.apple.com/thread/4357348?tstart=0

G5 mac reference - PASTED DIRECTLY FROM THE APPLE COMMUNITY SUPPORT PAGE AT THE LINK ABOVE:

Limnos Sep 26, 2012 9:00 AM
in response to Kort ' This helped me

For future reference:

Power-On Self-Test Beep Definition - Part 1 - http://support.apple.com/kb/TA43884

Power On Self-Test Beep Definition - Part 2 - http://www.info.apple.com/kbnum/n58442

The power on self-test resides in the ROM of the computer. This test runs whenever the computer is turned on after being fully shut down (the power-on self-test does not run if the computer is only restarted).

If a fault is detected during the test, you will not hear a normal startup chime. Instead, the system will beep as explained below. If you experience one of these beeps, you may call your Apple Authorized Service Provider for additional troubleshooting assistance.

1 beep = no RAM installed
2 beeps = incompatible RAM types
3 beeps = no good banks
4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
5 beeps = processor is not usable

In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.

You can also run Apple Hardware test from your original installer disc. Sometimes with RAM it is just easier to pull units and test them individually.

Aug 19, 2014 | Apple iMac Computers & Internet

1 Answer

Monitor screen shows side to side display instead of up and down. How do I return to up and down display


Dear,

To rectify your problem, Perfrom these steps.
Self-Test Feature Check (STFC) Your monitor provides a self-test feature that allows you to check whether your monitor is functioning properly. If your monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps:
  1. Turn off both your computer and monitor.
  2. Unplug the video cable from the back of the computer. To ensure proper Self-Test operation, remove both Digital (white connector) and the Analog(blue connector) cables from the back of the computer.
  3. Turn on the monitor.




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Mar 13, 2012 | Dell E228WFP Monitor

1 Answer

Screen won't turn on


You can try to do the monitor self test.
Monitor Self Test:
1. Physically test the monitor autonomously from the computer.2. Switch both the monitor and the computer off, and then disconnect the VGA cable le from the computer.3. Turn the monitor on, pressing the power button for about three seconds. The self-test screen will come up .4. If the image is clear, bright, and shows red, green, and blue, the monitor is working properly. Video issues may be due to the video resolution in the computer, and not the monitor.5. If the image is not apparent and intense or the colors are not accurate, then the trouble is with the monitor or some of the (OSD) settings. In this case, test your particular monitor's information for OSD.
It is always important to check the color of your power light for so you can distinguish if the monitor is defective. Getting red lights on the the power panel states that the power section of the monitor is faulty.

Dec 03, 2011 | Emerson Televison & Video

2 Answers

My computer wont boot up the fan and light turn on for a second then goes right off....


With the little bit of information presented, it appears that this is possible a power supply problem. One thing you can try is to unplug the power adapter from the laptop, remove the battery, then plug the power adapter back into the laptop. Then try to turn it on. If everything comes up normally, then the problem points, potentially, to the battery.
Hope this helps!

Feb 18, 2010 | HP Pavilion dv9000z Notebook

1 Answer

ViewSonic VX910 monitor appears to have power supply issue. The power light comes on for less than 1/2 sec, then goes off for about 1 sec, then just flashes green. If you play with the switch and the A/C...


try running the self test on the monitor
Self Test:
turn off the system disconnect the data cable from the tower and connect only the power cable to the monitor and trun on the monitor if you see colour full bars then the monitor is ok then try to go BIOS and see if the monitor is working

Jul 01, 2009 | ViewSonic VX910 19" LCD Monitor

1 Answer

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

Dell172fpb 17" monitor


Self-Test Feature Check (STFC) Your monitor provides a self-test feature that allows you to check whether your monitor is functioning properly. If your monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps:
  1. Turn off both your computer and the monitor.
  2. Unplug the video cable from the back of the computer. To ensure proper Self-Test operation, remove Analog (blue connector) cables from the back of computer.
  3. Turn on the monitor. The floating 'Dell - self-test Feature Check' dialog box should appear on-screen (against a black background) if the monitor cannot sense a video signal and is working correctly. While in self-test mode, the power LED remains green and the self-test pattern will scroll through the screen continually.
  4. Turn off your monitor and reconnect the video cable; then turn on both your computer and the monitor.
If your monitor screen remains blank after you use the previous procedure, check your video controller and computer system; your monitor is functioning properly.

Thanks
proton

Oct 26, 2008 | Dell E171FPb 17" Flat Panel LCD Monitor

1 Answer

Screen black


Take the post (power on self test) disconnect vga cable and connect power cable if monitor shows no signal check signal cable massage then monitor is ok fault is in cpu. open it and clean the dust
by vaccum cleaner you will get the display again

Oct 17, 2008 | X2Gen MG19MY 19" LCD Monitor

2 Answers

My monitor will not turn on


disconnect the monitor cable from your computer tower
if you get a 4 colored box which says power on self test. it means its not the monitor then you have to get the video card or the systemboard.

Jun 09, 2008 | Dell P793 17" CRT Monitor

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