Question about AcerScan 620PT Flatbed Scanner

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Acer (BenQ) 620 scanner cannot scan transparency

Recently moved scanner to a new computer. Installed the XP driver from BenQ site as Acer no longer supports this 10 year old printer and the scanner division was taken over by BenQ a while ago.
I can no longer select between reflective and transparency images as this menu choice is grey and is set to only scan reflective. I use this scanner for scanning x-ray films (transparency).
I recall that this was also a problem in the original setup many years ago but can't recall the fix(ya) on how to allow for transparency scanning.

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Can you put some backing on the transparency and scan it like a regular item?

Posted on May 05, 2017


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Posted on Jan 02, 2017


SOURCE: Set Parameters Failed

I'm having the same problem with my scanner Primascan Colorado 2400. Looking for a solution I landed on this page.
Website of scanner:
Answers there: nihil.

I bought this scanner some years ago. Worked very well with WindowsME, and until yesterday as well with WindowsXP-SP2 on my overall usually very compliant and compatible modern computersystem.
I used to scan from IrfanView. It always called the scanmanagerprogram very satisfyingly.

But as of yesterday following error-message:
(translated from Dutch) "Can't find entrypoint of procedure _P_ImageDownSample@24 in DLL-file ImgProc.dll."

I've noticed that WindowsXP has two ImgProc.dll's in \system32.
One from the scanner-installation and one probably installed with WindowsXP.

I've installed and reinstalled this very decent scanner several times. And it gets wel detected, without hardware-conflicts.
But, as it worked perfectly before on this same system, it suddenly doesn't anymore.

A pitty.
Maybe I will come back here when I've found the solution if noone else has by that time.


Posted on Dec 02, 2007

  • 1 Answer


I Want Mercury Scanner 620P windows xp Driver

Posted on Mar 26, 2009

  • 2678 Answers

SOURCE: Acer scanner Prisa 620PT won't work with Windows XP

I can only speak from experience but I have found HP to be one of the best for what you need.

Example here

Posted on Aug 06, 2009

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Recently upgraded my pc to windows 7 from windows xp professional. now my scanner does not work, not compatible with windows 7.. are there any drivers available that are compatible with windows 7

BenQ apparently never updated drivers for this hardware to work un a Windows 7 environment. I do not have this scanner myself, but I did come accross a site that indicated many were having luck with a driver found there. I was unable to test it as I lack the hardware. I do not know it it will work for you or not, but I offer the info for you to investigate to see if you can get it to work in Windows 7. The site is:

Lastly, if your version of Windows 7 is "Pro" or "Ultimate", it supports "Windows Virtual PC." Windows Virtual PC is a fully *free*, fully functional licensed copy of Windows XP Pro direct from Microsoft that "runs" in Windows 7. You can install applications and hardware in the Vitual PC just as if it were another computer. Follow the Virtual PC link above to learn more about it. You may be able to breathe new life into your BenQ scanner running it in the Virtual PC, if the driver mentioned in the first paragraph doesn't work for you.

Good luck! Please rate my reply "4 thumbs up" if it was helpful - thanks!

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