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Welcome to HP Customer Support

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  • Information
    Information regarding recent vulnerabilities

    HP is aware of the recent vulnerabilities commonly referred to as "Spectre" and "Meltdown". HP has published a security bulletin with patches for these issues and a list of impacted systems. We will continue to update the bulletin as more information becomes available and encourage customers to check the bulletin frequently.

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HP Photosmart 7350 and 7550 Printers - Using Reserve Mode When Printing

Introduction
Reserve Mode (RM) is the ability of the HP Photosmart 7350 and 7550 printers to provide reasonable quality output when a cartridge runs out of ink, is not compatible, or fails altogether. Reserve mode is initiated only after one of the ink cartridges is removed. The printer will exit reserve mode when two functioning ink cartridges are installed. Consult the tables below for printer display error messages and Reserve Mode output.
Liquid Crystal Display (LCD) messages
Error Message
Cause
Cartridge is not compatible, use appropriate HP cartridge, or remove it for reserve mode.
Incompatible cartridge
Cartridge failed, replace cartridge, or remove it for reserve mode.
Cartridge failure
Ink is low, replace cartridge, or remove it for reserve mode, press OK.
Cartridge is low on ink
Reserve Mode output
After one of the ink cartridges has been removed and the top cover of the printer has been closed, reserve mode will be initiated. When printing starts, the printer will display a *Printing* message on the LCD. The following color output can be expected in Reserve Mode.
Ink cartridge installed
Output
Black print cartridge
Colors are printed as grayscale
Tri-color print cartridge
Colors print, black is grayed (not true black)
Photo print cartridge
Colors are printed as grayscale
  note:
If a tri-color ink cartridge is used to print a black or monochrome document, the printing time will increase.

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