Question about Acer ScanPrisa 640P Flatbed Scanner

1 Answer

No letters come out or pictures

All plugs and connections are in and correct but when i use my scanner to scan someting it just comes out as big black square, somebody sugested that the bulb was gone if this is the case how do i open it to put new bulb in and where do i purchase this particular bulb from thanks christine.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 4 Answers

It quite simple to verify if the lamp is out. Just leave the the cover open and then switch the scanner on. The lamp should light up as the scanner initializes. Note if the full length of the lamp lights up. If it lights up only partially, then the lamp needs to be replaced. I doubt if the lamp is the problem though.

It is quite simple to get to the lamp but, you do need to be a little tech-savvy and own a soldering iron. Disconnedt the mains from the scanner. Turn over the scanner; the top is secured to the bottom by two recessed clips at the front button; release them with a screw-driver. Unsolder the two ends of the lamp. A new lamp can be purchased at a shop that sells computer spare parts. It's similar to the lamps that are used as back-lights in LCD screens. They come in different lengths so make sure you get one of similar length and solder it back in place.

Posted on Nov 23, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Scanner operates but only black scan appears


I have many years experience repairing Canon scanners so here is my suggestion for you.

If you try to scan in another peice of software is the image still black? Try using Microsoft paint to scan a document or picture in with. If you get a good image then the software your using to scan with needs to be corrected its probably a setting in the software.

If you scan with another piece of software like microsoft paint and the image is still black then my guess is that your imaging lens is defective on your scanner and will need to be replaced. If that is the case its probably cheaper to buy a new scanner then to have it replaced.

I hope this helps you out.

Feb 20, 2011 | Canon CanoScan 3000F Flatbed Scanner

14 Answers

No picture


you will need vista drivers found here :
http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=2093&lc=en&cc=us&dlc=en&product=446436
download them to your desktop and double click and follow the prompts

Oct 23, 2008 | HP Scanjet 4890

1 Answer

Bad contrast with scanner


Last things first: NO USER SERVICEABLE PARTS INSIDE.

That's the way HP does things. There are no rheostats or pots to adjust. It's all done electronically now, with chips and things.

You never said how it does with color or greyscale photos or drawings.

As for the RGB=(64,64,64), that's about right for the scan picture settings and the mixed (text and graphics) setting, and is particularly true for color picture settings. Have you tried using the setting for drawings (or line art), specifically greyscale drawings? Usually the greyscale lineart or drawing setting will render black text. You might also try scanning with the settings set for Text. If the greyscale drawing settings or greyscale text settings do not produce black text, try reinstalling your software and drivers.

If the contrast stays the same for all settings after reinstalling the software and drivers, and if it doesn't scan color and greyscale pictures correctly, then it sounds like your scanner is going bad.

As for the scans you've already done, you can darken the text by taking it into a photo editor, such as Paint Shop Pro or Photo Shop, and adjust the contrast and brightness to get the effect you desire.

Apr 18, 2009 | HP Scanjet 8250 Flatbed Scanner

1 Answer

My Umax Astra 1220U Flatbed Scanner will scan but the image comes out with a dark "haze" so as to barely read the document. What I am scanning is on white paper with black lettering. Can you help?


It probably needs cleaning. I had a streaking problem with my UMAX 1220 and followed the instructions on this website
http://www.willshak.com/scanner/

Remember to disconnect from the electricity supply!!!

The job is not too difficult and it restored my scanner perfectly.

Mar 17, 2009 | Umax Astra 1220U Flatbed Scanner

2 Answers

Driver scanner benq 3300u


If you have a BenQ Scan to Web 3300U, just plug in the scanner to your USB port on the computer and plug the power into the power bar. XP will recognize that you have connected the scanner to your pc. It will install the scanner immediately.. Go to MY PICTURES. The top option on the left hand side of the screen will be "to obtain pictures from a scanner or a camera". Click on this.. It will tell you that you have a flatbed#23 . Click on next. Using the preview button, scan the document. Using your mouse, make the scan box fit your picture or document. Then click on scan. Save your scan job . You can then view your scan job.

Dec 24, 2008 | BenQ Scan to Web 3300U Flatbed Scanner

1 Answer

Slide scanning with Epson Perfection 2450


I don't know if this is truly a "solution" or not, but I get the same thing on my HP 4850 scans. After scanning, I just crop the pictures to remove the black borders. Can you do that?

Dec 08, 2008 | Epson Perfection 2450 Photo Flatbed...

2 Answers

Using PaperPort 11 to scan


If you will go through the Advanced Setup wizzard and it completes you will have access to the "Display Scanner dialog"

Jul 18, 2008 | Apple Canon CanoScan N670U Flatbed Scanner

1 Answer

Blank Scan from HP Scanjet 5590 Flatbed Auto Feed


Scanning is possible in 'Text' mode and 'Picture' Mode. In text mode, which is simple 'Black & White", this can happen, particulalrly if the text is in color. Either you increase the contrast settings or scan the document in Grey/color and convert it to B&W using the software. By this you need not check if there is output!. ( I am assuming that otherwise the scanner is performing okay). File size in B&W is very small as compared to Grey/color.

S. Mohan

Apr 04, 2008 | HP Scanjet 5590 Flatbed Scanner

2 Answers

When printing a scanned object, paper is all gray


Whatever scanning utility you are using, set it to Black and white, not grayscale nor colour! regards, babb

May 05, 2007 | Umax Astra 610P Flatbed Scanner

Not finding what you are looking for?
Acer ScanPrisa 640P Flatbed Scanner Logo

81 people viewed this question

Ask a Question

Usually answered in minutes!

Top Acer Scanners Experts

k24674

Level 3 Expert

7987 Answers

Danny Kuhlmann

Level 3 Expert

1442 Answers

The Knight
The Knight

Level 3 Expert

68157 Answers

Are you an Acer Scanner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...