Hello,
If the paper jam and the toner lights are on, then the printer has an issue with the firmware on the formatter board.
Perform cold reset, if that does not resolve the issue, printer needs a formatter swap out or a repair.
Cold reset
A cold reset also resets all the HP Jetdirect settings as well as the printer settings.
Use the following procedure to perform a cold reset.
The printer's LEDs begin cycling. The cold-reset process runs until completion, and the printer returns to the ready state.
If both the Attention and the Ready LEDs turn on before you release the Go button, you must start the procedure again with step 1.
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