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Acer Monitor says "Input Not Supported"

I recently decided to upgrade from a Geforce 6150SE to a Geforce 9400GT. After uninstalling the old one and installing the new one, I tried to reboot. Everything seemed to load fine, but instead of giving me the login screen, it just said "Input Not Supported". I've tried uninstalling the 9400 and switching back to the 6150, but it still gives the same message when I try to boot up. It only works in Safe Mode or with no drivers installed. Everything was working fine up until I tried to upgrade.

My monitor is an LCD Acer AL1916W, 1440 x 900 @ 60Hz and it connects through VGA. I've tried changing the refresh rate settings, but the only option I get is "Use Hardware Default Setting".

One more thing, I'm using Windows Vista Home Premium 32-bit, if that helps.

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It would seem that your video setting

needs to be changed. Boot into safe mode and set the video resolution to the default settings that the monitor likes: 1440 x 900 @ 60Hz . In Googleing for that response, this thread is talking about the Acer monitors giving this message.
When you set the resolution, be sure to check the refresh rate to 60 Hz as that seems to be the stumbling block for the Acer.

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I've tried that

When I try to change the refresh rate to 60Hz, it only give me the option to "Use Hardware Default Setting". And the 1440 x 900 setting isn't available to me.

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I have figured it out!

I re-installed the new card, rebooted, hit F8 during startup, selected an option called something like "Enable Low Resolution" which started it up in a very, very low resolution. From there I was able to change the settings to 1440 x 900 @ 60 Hertz. It works like a charm, now.

Thank you.

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This works too

My HP computer does not have a video card. The video circuitry is on the mother board. Since I could not reinstall the card, I unpluged the monitor from the computer and turned the computer on. After waiting a few minutes to be sure Win7 booted up (I had no screen to tell me I was ok), I pluged in the monitor (took a chance and did it while the computer was running). To my delight, there was my desktop, just like it was before. Hope this helps. And thanks to all who contributed to UnoriginalUninspired.

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Spoke too soon

Unfortunately when I started the computer again it showed the "Input Not Supported" message. So, I tried this and it worked for sure this time. Start up in Safe Mode. Click the Start Button and type in MSCONFIG and double click on MSCONFIG.EXE. Go to the Boot tab and put an "X" in the Base Video box and click OK. Restart the PC.

When the computer starts, it will be in the lowest resolution with real big icons. Go to Control Panel and select a higher resolution from "Adjust Screen Resolution". The max I can use is 1024x768 with my Acer AL1916 monitor. If all looks good, go back into MSCONFIG and remove the "x" from the Base Video box and restart the computer. Good luck.

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thanks a lot dude^^

thanks a lot really makes me crazy before i followed your instruction and made my pc returns to it's previos settings..i really grateful to you dude!!!thanks again^^

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It really worked !!!

Thanks a lot it really worked out for me as well. Grin

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Input not supported - blackscreen

Having a similar problem.
I was on my computer testing out some new resolutions for a game a play. I tried putting back to my normal resolution and i must have selected the wrong one because the second I selected it my screen turned black with the message "input not supported" on it. I did some research about my problem and got to the solution that i need to boot into safe mode to fix it from there by entering with a lower resolution so that i can change back to my old one.
Tve thing is that it seems like i can't boot into safe mode, i have tried multiple times and still only gotten up the "boot device menu".
I'm on windows 8.

I would be really thankful for help and an answare.

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Re: safe mode

That's a timing issue. You let the BIOS do what it always does (the boot device menu is used to tell the BIOS to boot from another device that the normal hard disk) and then, when it did all that and started Windows (you still see a black screen), that's the moment to tap f8 (once a second is fine) to get the Windows menu asking what Windows thing you want to run (normal mode, safe mode, last known good configuration ....)


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None of those worked for me :'(

Hello guys! I just bought new acer p199hql monitor. And i'm having exactly same problem. My processor running on windows 10. When i start my conputer it's all ok untill the sign-in shows up. When i use my password and sign in to my user the probles shows up, "input not supported". I tried all of those methods. But none of it worked. I don't know what to do now.
I'll be so thankful if someone help me, please!

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just change your VGA

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