HP Officejet J5740 All-in-One Printer - Manual (Page 111)

There is a glass strip under the automatic document feeder.
5. Clean the glass strip with a soft cloth or sponge slightly moistened with a nonabrasive
glass cleaner.
CAUTION: Do not use abrasives, acetone, benzene, or carbon tetrachloride on
the glass, since they can damage it. Do not place or spray liquid directly on the
glass. The liquid might seep under the glass and damage the device.
6. Lower the automatic document feeder mechanism, and then close the cover of the
automatic document feeder.
7. Close the lid.
8. Plug in the power cord, and then turn on the HP All-in-One.
Check the estimated ink levels
You can easily check the ink supply level to determine how soon you might need to
replace a print cartridge. The ink supply level shows an estimate of the amount of ink
remaining in the print cartridges.
TIP: You can also print a self-test report to see if your print cartridges might need to
be replaced.
NOTE: The HP All-in-One can only detect the ink levels for genuine HP ink. The ink
levels in print cartridges that are refilled or have been used in other devices, might
not register accurately.
NOTE: The ink levels shown are an estimate only. Actual ink volumes may vary.
To check the ink levels from the HP Solution Center Software
1. In the HP Solution Center, click Settings, point to Print Settings, and then click
Printer Toolbox.
NOTE: You can also open the Printer Toolbox from the Print Properties dialog
box. In the Print Properties dialog box, click the Services tab, and then click
Service this device.
The Printer Toolbox appears.
2. Click the Estimated Ink Level tab.
The estimated ink levels for the print cartridges appear.
Check the estimated ink levels 109