My hp officejet pro 6835 (costco) scanned blurry images and shown some dark spots . how to fix it?

[Nitsupang]

My hp officejet pro 6835 (costco) scanned blurry images and shown some dark spots . It happenned from both scanning it from the glass screen and from the computer wireless remote order.

It is a wireless connection from my hp pavillion with touch screen, microsoft windows 8.1 of 64 bit

how do I fix it?

[KrazyToad · Accepted solution]

Hi @Nitsupang

Welcome to HP Forums. This is a great place to get support, find answers and tips.

I understand that you are facing Scan quality issues on your HP Officejet Pro 6835 

I'd like to help.

Do you face the same issue when scanning from the Automatic Document Feeder?

Let's start with a Printer Reset

(1) Turn the printer on, if it is not already on.
(2) Wait until the printer is idle and silent before you continue.
(3) With the printer turned on, disconnect the power cord from the rear of the printer.
(4) Unplug the power cord from the wall outlet.
(5) Wait at least 60 seconds.
(6) Plug the power cord back into the wall outlet.
 NOTE: HP recommends connecting the printer power cord directly to the wall outlet.
(7) Reconnect the power cord to the rear of the printer.
(8) Turn on the printer, if it does not automatically turn on.

The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.
Wait until the warm-up period finishes and your printer is idle and silent before you proceed.
 

Next clean the Scanner Glass and also the ADF 

Steps to clean the ADF Rollers

1. Gather the following materials:

   • A clean, lint-free cloth, or any cloth that does not come apart or leave fibers

   • Distilled, filtered, or bottled water (tap water might damage the printer)

2. Remove the original document from the ADF.

3. Turn off the printer.

4. Disconnect the power cord from the rear of the printer.

5. Open the ADF cover.

6. Find the paper pick rollers and the separator pad inside the ADF.

   Figure : Example of the paper pick rollers and separator pad in a LaserJet printer

   

   Figure : Example of the paper pick rollers and separator pad in a OfficeJet printer

   

7. Lightly dampen a clean, lint-free cloth with filtered or distilled water, then squeeze any excess liquid from the cloth.

8. Use the damp cloth to wipe any residue off the paper pick rollers and the separator pad.

9. Leave the ADF cover open for two minutes to allow the paper pick rollers and separator pad to dry.

10. Close the ADF cover.

11. Reload the original document print side up in the document feeder tray. Gently slide the document into the printer as far as it can go.

12. Slide in the paper width guides until they are snug against the paper.

    Do not push the paper width guides in so far that they bend the paper.

13. Reconnect the power cord to the rear of the printer.

14. Turn on the printer

You can also refer to this Link.

If the issue persists, please contact our Phone Support for Service Options

Step 1. Open link: www.hp.com/contacthp/
Step 2. Enter Product number or select to auto detect 
Step 3. Scroll down to "Still need help? Complete the form to select your contact options"
Step 4. Scroll down and click: HP contact options - click on Get phone number and phone number appear.

Thank you 🙂

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" 

[Nitsupang]

Thank you very much @KrazyToad.

It's getting better after following your advice by cleaned all areas.Only the scanning, it left a minor shadow at the  top left corner.

Appreciated.

[KrazyToad]

Hi @Nitsupang

I'm glad the scanning is getting better. Please repeat those steps few more times and that should fix it.

Thank you 🙂