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.
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.
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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.
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.
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.
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.