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- HP Community
- Printers
- DesignJet, Large Format Printers and Digital Press
- Lights flashing and won't go through warm up cycle

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04-10-2020 06:02 PM
I was using print just for scanner without any ink cartridge and it was working fine. It stopped working and all lights started flashing. I bought new ink cartridges and performed reset several times. It won't even start the warm up or task cycle, lights just start flashing???
04-15-2020 08:23 AM
Welcome to the HP Support Community.
Please ensure the complete product name/number for a quicker response from the community, as we need to know what we are dealing with to provide an accurate solution:
Click here for steps on finding the information we need!
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http://support.hp.com/us-en/document/c03754824
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I am an HP Employee
04-20-2020 12:15 PM
Try the steps from here: https://support.hp.com/us-en/product/hp-deskjet-f4500-all-in-one-printer-series/3944755/model/394475...
Try updating the firmware: https://support.hp.com/in-en/document/c02919168
Let me know if this helps.
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Have a great day!
I am an HP Employee