Cant find backend for new scanner

I recently bought a new printer/scanner to my raspberrypi. The old one was HP_LaserJet_M1005. It worked fined. Now I installed a new scanner, HP_LaserJet_MFP_M28-M31, and I get errors. Until now, I tested this: pi@raspberrypi:~ $ sudo sane-find-scanner -q found possible USB scanner (vendor=0x03f0 [HP], product=0xbf2a [HP LaserJet MFP M28-M31]) at libusb:001:014 found possible USB scanner (vendor=0x0424, product=0x7800) at libusb:001:007 pi@raspberrypi:~ $ scanimage -L device `hpaio:/usb/HP_LaserJet_MFP_M28-M31?serial=VNC6912904' is a Hewlett-Packard HP_LaserJet_MFP_M28-M31 all-in-one pi@raspberrypi:~ $ scanimage > image.jpg --format jpeg scanimage: open of device hpaio:/usb/HP_LaserJet_MFP_M28-M31?serial=VNC6912904 failed: Error during device I/O I also tried with DEBUG enabled, the log ends like this: [hp] hp_read_config: attach usb 0x3f0 0xbf2a [hp] hp_attach_matching_devices: usb attach matching "usb 0x3f0 0xbf2a" [hp] hp_attach: "libusb:001:014" [hp] hp_get_dev: New device libusb:001:014, connect-usb, scsi-request=0 [hp] sanei_hp_device_new: libusb:001:014 [hp] hp_GetOpenDevice: device libusb:001:014 not open [hp] hp_nonscsi_open: open usb with "libusb:001:014" [hp] hp_nonscsi_open: device libusb:001:014 opened, fd=0 [hp] hp_AddOpenDevice: added device libusb:001:014 with fd=0 [hp] scsi_flush: writing 2 bytes: [hp] 0x0000 1B 45 .E [hp] scsi_flush: writing 7 bytes: [hp] 0x0000 1B 2A 73 32 35 37 45 .*s257E [hp] scsi_read: 16 bytes: [hp] 0x0000 48 54 54 50 2F 31 2E 31 20 34 30 30 20 42 61 64 HTTP/1.1 400 Bad [hp] scl_inq: malformed response: expected '257d', got 'HTTP/1.' [hp] scl_errcheck: Can't read SCL error stack: Error during device I/O [hp] hp_nonscsi_device_new: SCL reset failed [hp] scsi_close: closing fd 0 [hp] hp_nonscsi_close: closed fd=0 [hp] scsi_close: really closed [hp] hp_RemoveOpenFd: removed 0 [hp] hp_read_config: reset to default config [hp] sane_get_devices will finish with Success scanimage: open of device hpaio:/usb/HP_LaserJet_MFP_M28-M31?serial=VNC6912904 failed: Error during device I/O [hp] sane_exit called [hp] hp_destroy: global.is_up = 0 [hp] sane_exit will finish What can I do to get the scanner to work? Regards