User can not intervene in cycle of on/off, each time it cuts itself on the display reads "improper shut down, do not use power cord or power strip to turn printer off". then without waiting for a response it shuts off and starts the cycle again. I can't find my user manual.
Got the same problem following a message "Printer ink failure" code 0xc19a0035. Instructions say to shut down using button on/off. But printer refused to shutdown. After 30 minutes, I disconnected power cable. Removed cartridges. Reloaded cartridges. Reconnected power cable and got "Improper shutdown" message with continuous cycle.
Solution:
1. While the printer is still turned on, unplug all cables and cords at the back of the printer.
2. Unplug the power cord also from the wall outlet...
3. Wait for two minutes.
4. Reconnect power cord to the wall outlet first.
5. Press and hold the pound (#) and six (6) buttons.
6.
While holding down the two buttons, reconnect the power cord to the
back of the printer and after two seconds, release pound and six
buttons.
7. Turn on the printer if it turns off... and it's fixed.
SOURCE: improper shutdown following a 0xc19a0035 ink failure problem
Read this:
The HP Product Turns Off Repeatedly
Also try the links at the end of the page.
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