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Mag monitor doesn't display bios post

My Mag 19inch LCD monitor does not display the bios post during boot up but only starts displaying when Windows boots. My graphics card is a Sapphire 3850 256meg. When I switched monitors to a Samsung 22inch LCD, the bios post is visible and everything is normal. I then switched graphics card to a Sapphire X1950Pro and tried this with the Mag monitor. I was able to see the bios post again. The problem is confined to the Mag monitor and the 3850 graphics card which only displays once Windows starts and does not show the bios post. The cable used is an 18pin single link DVI cable. Do you think a dual link cable might solve the problem?

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I have no experience with the DVI links because such technology is still unavailable here in Argentina. We have DVI video cards but finding a suitable DVI monitor is another (long) story.
I think that your card (that has 2 DVI ports) is initializing one port first (the primary one) and then, when windows starts, it initializes the other and outputs video from both ports.
Try connecting the monitor in the other DVI port.
If your card has a VGA output, the VGA gets initialized first.

Posted on May 07, 2008

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I have a dell e5420 on booting it brings a white screen display but when connected to an external monitor it display properly what can i do cheers


Hi omovik,

Good observation on the external monitor piece. Check if the notebook display works fine when you enter BIOS (F2 during start-up) or during diagnostics (Fn+Power). If the issue persists on these steps then it's a faulty LCD. Do keep me updated on the status.

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Hi ! i have dell vostro 1510 and which is not booting up. even the bios is not showing up. Black screen appears and the loading lights blinks for 4-5 times then nothing happens. Power button is glowing...


- try to plug an external monitor on your laptop
- if you can see a screen on the external monitor, then you have a faulty LCD
- if you don't see anything on the external monitor, then you have a faulty motherboard

Jul 04, 2011 | Computers & Internet

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Meron power pero ayaw mag on


Hi arcymiguel,

If you see power lights but nothing appears on the screen, it could be a "POST" (Power-on Self Test) problem or simply LCD problem.

Here are some steps that you can try.

1. Remove the battery and the ac adapter then press the power button for at least 20 seconds to drain electric charges left from the system. (You may need to repeat this step to get it work.)

2. If above step doesn't work, try to plug in an external monitor and see if you get display from the external monitor. You may need to press the Fn + F4 or F5, depends on the key designed on the keyboard to toggle between displays.

3. If you get display from the external monitor, I'm sure your having problem with the LCD components. In this case, check and replace faulty LCD backlight, LCD cable or LCD inverter. The LCD inverter is often a culprit.

4. Try to reinsert the memory module/s (RAM) of the unit, try using one RAM at a time to see if it works. A faulty RAM will cause the issue not to POST.

5. If reinserting the RAM doesn't help, most likely your motherboard needs to be replaced.

Hope this helps.

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I have lg m198wdp monitor tv.problem is white screen


When does it happen?
During Self test? Try this by unplugging the cable that connects to your tower and see if the self test runs. if it does, then your monitor still works. If it doesn't you might need to replace your LCD
During BIOS? If it works then your monitor still works. If it doesn't you might need to replace your LCD
During Windows? then you might need to adjust your display properties or reinstall your video card drivers.

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My monitor comes up during start up but after 60 seconds or so it goes into sleep mode? and the monitor goes black


You might have it connected using the wrong port on the back of your computer. The monitor will display the BIOS and post messages but once it gets to windows it will turn off. The other possibility is you need to either reload the driver for your video card, change the default display device in the bios, or replace your video card.

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Screen in two parts, just during boot


Don't worry about it. During boot time, the input to the monitor is set to a different resolution (640X480 for plain text). The monitor remembers settings for different resolution inputs, and the position is wrong but it's not a monitor problem as such. You could adjust the position and the display would be properly centered, but it's not worth the effort. Once the system starts Windows and the resolution switches to your normal settings, the display looks right. Once in Windows, you can't even set the resolution low enough to adjust the monitor; Windows won't go below 800X600 pixels.

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I have a MAG INNOVISION LT765s LCD monitor. When the computer boots up, the power button on the monitor won't stay on so the display won't come on. It sometimes takes an hour of fooling around with the...


I have had similar problems with my Mag LCD monitor. I recently dicovered that the problem was with the adapter and not the monitor. Try replacing the power adapter.

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My dell lcd monitor will not stay on


If the problem related to wrong PC (video adapter) settings, during boot-up, right after BIOS started, press F8 button to call OS startup menu, choose there 'VGA Mode', then OS will be loaded with basic VGA settings (640x480 250 colors), so you will be able to set other display settings, proper for your monitor.
But all that, of course, won't be possible if the monitor itself shuts down, that would be completely different story.
Confirm what exactly is wrong, Display Settings or the monitor itself?

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Mag monitor doesn't display bios post


The BIOS is sending the display information to the monitor but, when you turn your PC on, the LCD will be sleeping and it will take 1~2 seconds to wake up when receiving the display signal. The monitor is working and even if the BIOS messages aren't displayed, you can still press the correct keystrokes to get to the SETUP screen or press PAUSE in the keyboard to see what's going on in the POST.
If your LCD has a bicolor LED indicating the status (Standby/On) keep looking at it, when the LCD gets the video data, the LED turns instantly from amber to Green or blue even if the screen is still black. This way you can have an idea when the LCD gets the initial video signal and to press the keys accordingly.
Your PC will also delay the video output from the secondary video card because it's detected after the onboard card.

May 03, 2008 | Computers & Internet

1 Answer

On Pwr up logo appears then LCD returns to stanby Black screen


I will assume the monitor is staying on during the boot process all the way until Windows loads.
If that is the case, then...
  • Start the computer
  • wait until the initial bios/logo screens for your motherboard go away.
  • Press F8 to get the Windows recovery boot menu
  • If you see the Windows Logo you would normally see then press rest and try again.
  • In the recovery screen, select SAFE MODE
  • Boot into Windows and uninstall your video card.
  • Reboot the computer the normal way through the start menu.
  • When your PC starts back up it should then reinstall the video card, and set itself automatically back to 60khz as default.
Let me know how you go =)

Jan 20, 2008 | BenQ FP71E 17" LCD Monitor

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