OfficeJet Pro 8715 not print from devices. The dashboard light blinks green and has a ? on it.

[SJAPrin]

OfficeJet Pro 8715 will print from devices, neither tablets or iPhones. The dashboard light blinks green and has a ? on it. Will start to recognize the command and then just stop. Will not even do a test page. Also, the home screen command bar blinks green then black.

[Echo_Lake]

@SJAPrin

Thank you for posting on HP Support Community.

Don't worry as I'll be glad to help, I have a few troubleshooting steps we could try to fix the issue:  

• With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.
• Remove USB cable, if present.
• Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.
• Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord (This is important) and then plug back the power cord to the printer.
• Turn on the printer and wait till warm-up period finishes and the printer is idle.

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.