I have a printer F4288 ant it works very well . But today at a time when i turn on power supply all lights of the printer are blinked but after that printer won't respond by pressing power button or with out pressing start button. That time there is most probably no cartridge or colour cartridge.
After some time when i check power adapter i see it is ok and led is on.
Greetings gurudev! Based on your input, I understand that there is an issue with the HP All-in-One Printer. I have attached a document that discribes solutions to issues related to blinking lights on this unit. Please click on the linked title below, it will direct you to the document.