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Windows 7: "Generic Non-PnP Monitor" Acer S240HL Tri Monitor setup.

08 May 2015   #1
helloimgeoff1

Windows 7 Home Premium x64
 
 
"Generic Non-PnP Monitor" Acer S240HL Tri Monitor setup.

Hi all,

This issue really bugs me, every few months it'll happen, one of my three screens (9/10 times it's the Acer), will display as a "Generic Non-PnP Monitor", with this it'll only display in 640*480 (usually 1920*1080, same as the other 2 screens).

This set up works perfectly most of the time, and has done for the last few years, but as I said it comes and goes. I've done a lot of research online and the best advice I can find is that when it happens if I unplug it all, and let the capacitors drain in the monitor and GPU then when reconnecting everything it'll work fine. I've done this before and it's not worked, I've also done it and it's worked. I've also had it in the past where it's just reverted back to how it's supposed to be mid use.

My set up:
OS: Microsoft Windows 7 Home Premium 64-bit SP1
CPU: Intel Core i7 3770 @ 3.40GHz
Motherboard: ASUSTeK COMPUTER INC. CM6330_CM6630_CM6730_CM6830
Display 1: SONY TV (1920x1080@60Hz)
Display 2: Samsung S24B300 (1920x1080@60Hz)
Display 3: Acer S240HL (1920x1080@60Hz) <--- Displaying as "Generic Non-PnP Monitor (640x480@59Hz)"
GPU: AMD Radeon HD 7800 Series

I've got the latest drivers for all the hardware, I've got the latest windows updates for everything. I've tried older versions of the drivers for the GPU, no difference with the issue.
I've been to the Acer website to download a driver specifically for the monitor, but they haven't got one on there for this montior on this OS, just for Windows Vista (which Windows 7 won't recognize as an install-able file).

Any help would be much appreciated, this is driving me up the damn wall!!!


My System SpecsSystem Spec
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09 May 2015   #2
rvcjew

7 Pro x64, 10 Pro x64
 
 

You can try forcing the install of the vista 64 bit driver, you pick update driver then follow the yellow steps and if you get the bottom picture if its unsigned just pick install anyway.

Good luck


Attached Thumbnails
&quot;Generic Non-PnP Monitor&quot; Acer S240HL Tri Monitor setup.-force-install.png  
My System SpecsSystem Spec
09 May 2015   #3
helloimgeoff1

Windows 7 Home Premium x64
 
 

How can I do this? The download gives me 2 files, I've tried to install them but it just says error and no further options.

Thanks
My System SpecsSystem Spec
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09 May 2015   #4
rvcjew

7 Pro x64, 10 Pro x64
 
 

Quote   Quote: Originally Posted by helloimgeoff1 View Post
How can I do this? The download gives me 2 files, I've tried to install them but it just says error and no further options.

Thanks
Oh crap sorry forgot to upload the pic I made sorry. I edited my first post, you want to use the inf the icc file is for color. Once you add it to the list you need to pick from it then it might ask you in red if its unsigned.
My System SpecsSystem Spec
09 May 2015   #5
helloimgeoff1

Windows 7 Home Premium x64
 
 

I'll go try now and get back to you!

Thanks a lot for the speedy reply
My System SpecsSystem Spec
09 May 2015   #6
helloimgeoff1

Windows 7 Home Premium x64
 
 

Right, I've tried what you said, followed it to the letter. The driver I downloaded from the Acer website had 2 files in it, S240HL.inf and S240HL.icm, I've ignored the icm file. I forced the install of the inf file for the "Generic Non-PnP Monitor", and now on the device manager it's changed the name to the model of the monitor (the others just say "Generic PnP Monitor"). It's still had no effect the running of the display.


Any more thoughts on this? I've tried the cold boot option, the pc has had hours of downtime and it's still not working for me.
My System SpecsSystem Spec
27 May 2015   #7
thetrivialstuff

Windows 8.1 Enterprise & Pro 64-bit, Windows 7 Enterprise 64-bit
 
 

I ran into a similar problem on my work laptop last night, with a Samsung monitor -- and cold booting everything, leaving the monitor unpowered overnight, etc. also didn't work; it still showed as "Generic Non-PnP monitor" and wouldn't let me use the native resolution.

This morning I tried plugging the monitor into a Linux machine, which lets me force the resolution even if the monitor isn't detected as PnP -- and it worked there. Then when I plugged it back in to the Windows laptop it was detected as plug & play again, and everything worked.
My System SpecsSystem Spec
27 May 2015   #8
rvcjew

7 Pro x64, 10 Pro x64
 
 

Quote   Quote: Originally Posted by thetrivialstuff View Post
I ran into a similar problem on my work laptop last night, with a Samsung monitor -- and cold booting everything, leaving the monitor unpowered overnight, etc. also didn't work; it still showed as "Generic Non-PnP monitor" and wouldn't let me use the native resolution.

This morning I tried plugging the monitor into a Linux machine, which lets me force the resolution even if the monitor isn't detected as PnP -- and it worked there. Then when I plugged it back in to the Windows laptop it was detected as plug & play again, and everything worked.
Odd I wonder if the monitor just needed it self reset. OP you should try this as well, see if your OSD of the monitor has a reset option.
My System SpecsSystem Spec
10 Jun 2015   #9
cdavis

Windows 7 Home Premium 64 bit
 
 

Thank you so much, this worked for me. Just bought the monitor and have been messing with it for quite a while and was thinking about returning it! I followed the steps above then went into my display settings and the monitor display was set to disconnected. I set it up as an extended display and works great.
My System SpecsSystem Spec
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 "Generic Non-PnP Monitor" Acer S240HL Tri Monitor setup.




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