Teclast x98 plus II - Help needed

Got my new teclast a couple of days ago. It's the one with only android. When playing around with it for the first time I noticed that it said headphones plugged in even though they weren't. When I do plugin headphones I get sounds in them but otherwise not a sound. Does anyone know or can test if alarm sounds play out loud even when headphone are plugged in. I don't get any sound from alarm. Tried some apps that should make the speaker ignore plugged in headphones. No success. Compressed air in jack.No success.

Any suggestions?

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