Scanner failure I have a hp deskjet d145 and it just keeps saying scanner failure. When I press the copy button it says warming up and I hear a click inside. Then it starts to pull the paper in and then it says scanner failure...help! I just bought new ink for this and don't want it to go to waste!

Hello it means that the scanner bulb temperature is too low or there is some internal or external electrical malfunction.Try these solutions.
1.Check the scanner light.Make a color copy of any document by pressing the Start, Copy, Color button on the product control panel.While the product is making the copy, lift the scanner lid slightly to see if the scanner light is visible.
2.Make sure that the room temperature is suitable for your device
3.Perform a Power Cycle on the unit by following the steps below:
1.Turn the unit off.
2.Unplug the power cord from the unit.
3.Wait 30 seconds, and then re-connect the power cord to the unit.
4.Turn the unit on.
5.Make a color copy by pressing the Start Copy Color button on the control panel.
4.Check the power connections.Disconnect the power cord from any power strips or surge suppressors and then plug it directly into a wall outlet.Try making a color copy by pressing the Start Copy Color button on the product control panel.If the error message displays again, temporarily move the product to a different room, or plug the power cord into a different wall outlet.
5.Perform a partial reset
1.Disconnect the power cord from the product.
2.Press and hold # and 3 while reconnecting the power cord to the product, and then release both buttons.
3.Try making a color copy by pressing the Start Copy Color button on the product control panel.
6.Perform a semi-full reset(Performing a semi-full reset deletes any saved phone numbers on the product).
1.Disconnect the power cord from the product.
2.Press and hold # and 6 while reconnecting the power cord to the product, and then release both buttons.
3.Try making a color copy by pressing the Start Copy Color button on the product control panel.
If nothing of these works and you still see the error you should take your printer to support service for repairing the parts.

The scanner motor may be jammed. The only way to fix this is by a repair technician.

Since when this problem started (have you done any updates or instalation of application,), Have you try Reset the Printer after replug and power on.

Please find updates for your Printer from the Official website of HP

Also check out if you can go for Reinstall the Printer (best option): HP- D145 Officejet

replace the scanner or the whole unit. only way I have found is to replace the top half of the machine

it's the warm up cycle for those printers..

check this link out for more printer tips

Scanner Failure, Power Off and On' Message Displays on the Control Panel when Copying or Scanning


Issue
The message 'Scanner failure, Power off and on' displays on the control panel of the product.
This error usually occurs when trying to scan, to make copies, or during the product start up.
Try the solutions in this document until the issue is resolved. It is not necessary to continue to the next solution if one solution resolves the issue.
Solution one: Check the scanner light
Make a color copy of any document by pressing the Start Copy Color button on the control panel. While the product is making the copy, slightly lift the scanner lid to see if the scanner light is visible.
CAUTION: Do not look directly at the light. It is not necessary to completely open the lid to see the light.
If the scanner mechanism moves across the scan bed, but the light is not lit, click here to service the product .
Solution two: Check operating conditions
Extreme temperatures can affect the operation of the product. Make sure the operating conditions match those recommended in the User Guide provided with the product.
Solution three: Check the power connections

1.
Make sure that the product is connected directly to a grounded wall outlet and not plugged into a power strip.
2.
Make a color copy by pressing the Start Copy Color button on the control panel.
3.
If the error message persists, temporarily move the product to a different room or outlet, and then make a color copy by pressing the Start Copy Color button on the control panel.
4.
Check the part number on the power supply to make sure that it matches the part number listed in the User Guide.

Solution four: Perform a power cycle

1.
Turn the product off.
2.
Unplug the power cord from the product.
3.
Wait 30 seconds, and then reconnect the power cord to the product.
4.
Turn the product on.
5.
Make a color copy by pressing the Start Copy Color button on the control panel.

Solution five: Reset the product
Follow these steps to reset the product.
Step one: Perform a partial reset

1.
Unplug the power cord from the product.
2.
Press and hold # and 3 while plugging in the power cord.
3. Make a color copy of any document by pressing the Start Copy Color button on the control panel.
If the partial reset resolves the issue, do not continue to the semi-full reset.

Step two: Perform a semi-full reset
CAUTION: Performing a semi-full reset deletes any phone numbers that are saved on the product.

1.
Unplug the power cord from the product.
2.
Press and hold # and 6 while plugging in the power cord.
3. Make a color copy of any document by pressing the Start Copy Color button on the control panel.

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

scanner failure, turn unit off and back on, does not help

It could be the bulb. Sometimes disassembling the scanner and thoroughly cleaning the glass and mirror will help.

Checxk the manual for FAQ's Check makers tech help site,looks like a service job