No paper detected in document feeder

SOURCE: HP LaserJet 2840 Scanner problem

Yes, but I don't see any actual paper jams. I have a Vista O/S and I've been reading that that might be the problem; the 2840 scanner driver is not compatible with the Vista O/S and HP hasn't produced a solution yet. I appreciate your efforts, thanks.

SOURCE: Problem with scanning both from the auto feeder and from scanner glass

this is what HP has to say

This document applies to all HP product models. Issue When the product is turned on or in the middle of an operation, an unexpected noise occurs, such as clicking, thumping, or grinding. Blinking lights and error codes might accompany the noise. NOTE: Noises can be caused by a number of things. This document focuses on isolating, identifying, and resolving known causes of product noises. Solution Noises are subjective and can be difficult to describe. Some noises are normal to the operation of the product and might include the following:

• The product might make humming and buzzing sounds as the carriage moves around on the right or left side of the product while cleaning the ink cartridges. This is normal when a product is turned on, before and after printing, after a product has been on standby for some time, after replacing an ink cartridge, or in the middle of a large print job.
• During a print job, the movement of rollers, gears, carriage, and paper (paper feed and ejection) creates some noise.
• During a print job, if the product is printing in the fast or draft mode, the noise level might be higher than when using the best or normal mode.
• At the end of the print job, a louder clicking noise occurs as the paper is pushed to the output tray.
• At the end of a print job, a noise emanates from the left or right side of the product as the pens are capped. The product might try to do this a couple of times.

Abnormal noises are a symptom of a problem. The most accurate way to determine the origin of a noise is to isolate where it comes from and when it occurs. Use the following steps to try to isolate the noise issue. NOTE: Error codes might indicate the source of the noise. Make a note of any error code or blinking lights that appear. Step one: Check for loose or broken parts

1. Raise the cover of the product.

1. Check inside for loose or broken parts.
2. If there are broken parts, the product needs to be serviced.
3. Step two: Make sure that accessories are installed correctly

1. Press the power button ( ) to turn off the product.
2. Remove the power cord from the back of the product and unplug the power cord from the power source.
3. Check any accessories (duplexer, envelope feeder, automatic document feeder (ADF)) to make sure each is installed and seated correctly.
4. Plug the power cord into the back of the product and plug the power cord back into the power source.
5. Press the power button ( ) to turn on the product.
6. If the noise still persists, remove each accessory one at a time to try to determine if the noise is associated with a single accessory or a combination.
7. If the noise stops when a specific accessory is removed, that part might need to be replaced. If possible, exchange the accessory with a known good one or a new one to determine if the noise is associated with the accessory. NOTE: If the product is fully functional with the accessory in place, the noise might be normal.
8. If the noise persists, proceed to the next step.

Step three: Check connection with computer Turn off the computer to determine if the computer is the source of the noise. If the noise persists, proceed to Step four. If the noise stops when the computer is turned off, try to isolate any issues with connectivity:

1. Press the power button ( ) to turn off the product.
2. Disconnect the USB cable from the product.
3. Unplug the power cord from the wall outlet and from the back of the product.
4. Wait a couple of minutes to allow static to be discharged.
5. Plug the power cord into the wall outlet and plug the power cord into the back of the product.
6. Connect the product to a different USB port.
7. Turn on the computer.
8. Press the power button ( ) to turn on the product.
9. If the noise persists, service the product.

Step four: Check for a paper jam Paper jams can prevent the internal components of the product from moving, which can create unusual noises.

1. Press the power button ( ) to turn off the product.
2. Disconnect the power cord from the back of the product.
3. Remove the rear access door.
4. Remove any paper that is inside the product by pulling it out through the rear access door and then securely replace the rear access door.

1. If a paper jam cannot be removed from the back of the product, raise the product cover, carefully remove the paper jam from the front of the product, and then lower the cover.

NOTE: Remove any paper jam carefully as it is possible to damage the product when removing a jam from the front of the product.

1. Reconnect the power cord to the back of the product.
2. Reload the paper in the paper tray.
3. Press the power button ( ) to turn on the product.
4. Try to print. If a jam is cleared and the product prints, but the noise persists, proceed to the next step.
5. Step five: Make sure that the carriage moves freely

1. Press the power button ( ) to turn off the product.
2. Disconnect the power cord from the product.

1. Make sure that the ink cartridges are locked into the carriage and have not come loose. Also make sure that there are no obstructions under or around the carriage to prevent it from moving.
2. Close the product cover and reconnect the power cord.
3. Press the power button ( ) to turn on the product.
4. If the noise persists, proceed to the next step.
5. Step six: Plug the product into a wall outlet

If the product is plugged into an uninterruptible power supply, that source might make a beeping or whistling noise.

1. Unplug the power cord from any power strips or surge protectors.
2. Plug the power cord directly into a wall outlet instead.
3. Press the power button ( ) to turn on the product. If the noise persists, proceed to the next step. If the noise stops when plugged directly into a wall outlet, the power strip or surge protector might not be allowing sufficient voltage to reach the product and might need to be replaced.

Step eight: Service the product If you have completed all the steps listed above and are still experiencing a problem, service the product.

Comments by scrodamoon in premium

SOURCE: paper in document feeder

there is no paper in document feeder

SOURCE: epson workforce 600 error message; please clear document feeder

Hi there.
Still there might be traces of dust or small paperpiece somewhere.
Iceman.

SOURCE: automatic document feeder pulls paper through only part way

You need to replace the document feeder motor the gears on the motor shaft are split and slipping. New motor is 12.72 at http://www.compassmicro.com/parts2.cfm