My coby mid4331 won't turn on

Try a Hard Reset.

Hard Reset COBY Kyros MID9742, how to - HardReset.info

https://www.hardreset.info > devices > coby-kyros-mid...
The following tutorial shows all method of master reset COBY Kyros MID9742. Check out how to accomplish hard reset by hardware keys and Android 4.0 Ice Cream ...

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  Factory Reset COBY Kyros MID9742, how to - HardReset.info

  https://www.hardreset.info > devices > hardreset-second...
  HardReset COBY Kyros MID9742; To enter the Recovery Mode hold down the Power key for a short while. Remove Screen Lock on COBY Kyros MID9742; From the menu ...

COBY Kyros MID9742 Hard Reset - HardReset99

https://www.hardreset99.com > coby-mobile > coby-ky...
27 Feb 2017 - Volume down + Volume up + Power button For a while. Please try above all steps one by one, Until you will see Android reboot or fast boot menu.

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A really annoying issue but your password is Your and only you are supposed to know it.
So I guess your only choice is to do a Factory Reset of your Coby tablet:

Hope this Youtube tutorial might help you:



Factory reset on Kyros MID 7012 without using Settings

Also you should read these tutorial:

Coby Kyros MID7010 hard reset


http://webcache.googleusercontent.com/search?q=cache:eQiuI75ELTMJ:resetandroid.com/coby-kyros/+&cd=6&hl=es&ct=clnk


http://www.androidtablets.net/threads/how-to-factory-reset-on-coby-kyros.24344


You can get some more information doing a google search for

factory reset of Coby kyros Tablet

Sounds like a corrupted kernel. The only thing you can do is download adb tools and then download the original Coby files for android. without having to do alot of research(if you dont know how to, you will have to research) you can go to Androidcentral.com go to the coby section, in the forum. There you should be able to find the step by step method. Sorry but this would be about the best help I can give you with out actually doing it myself.

Try instructions in the link:
How do you reset your coby kyros if ive forgot the password

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sometimes it get over heating soo give it some time to cool of !!

You need to upgrade your firmware. Follow the firmware update instructions under the downloads tab at the following website: http://www.cobyusa.com/?p=prod&prod_num_id=10572&pcat_id=3001

Mine does that to but all I ever do it just hit the reset button on the back and it turns back on.

I would first try a different power cord/brick and make sure that isn't the issue. If that still doesn't work then you may have a broken port on your Kyros. In that case try and get a warranty replacement and if that isn't feasible you will most likely have to pay for the repair. If you recently dropped it while it was plugged in, that may have broken the connection between the port and the device.