I understand you are not able to scan, let us try these steps:
Reset the printer
With the printer turned on, disconnect the power cord from the rear of the printer.
Wait at least 60 seconds.
Reconnect the power cord to the rear of the printer.
Turn ON the printer, if it does not automatically turn on.
Wait until the printer is idle and silent before you proceed.
Note: HP recommends connecting the printer directly to a wall outlet rather than a surge protector or a power strip.
Update the printer firmware
Click here to download and install the latest printer firmware from your PC.
Click here to know different methods of updating printer firmware.
Check the scanner bar functionality
Perform a visual test of the scanner mechanism to see if it is jammed.
Remove any original documents or photos from the scanner glass.
Lift the scanner lid slightly, and then press the Copy button or icon.
Try making a standalone copy and check if that works. By this, we can conclude if this is a hardware or a driver issue.
If the scanner light does not move or moves halfway or is not lit, the scanner mechanism is likely jammed/broken. In this case, please reach out to the HP Technical Support team in your region regarding the service options for your printer.
You may create a case on the website to obtain a case number if required. Kindly watch this video to know how.
Keep me posted for any other assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
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Yesterday morning during my last desperate trouble shooting I was advised that there was an upgrade to Print & Scan Doctor which I installed ( 5.5.1) and this fixed my problem on the new HP DJ3630 and was good for all my work day.
The old 3632 light carriage limit I agree is a mechanical problem and at A$ 35.00 three years ago isn't worth the effort.
I will donate to Salvos or similar as it still prints.
Your reply and suggestions are very much appreciated and I wish you all the Very Best for the Holiday Season and 2021 - hopefully better than 2020.
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