My coby kyros mid9742 will not start up at all it just keeps rebooting

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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Not a fuse that can be changed you might want to double check how you inserted the charger because I've unknowingly pushed it in wrong and it didn't connect properly and pushed the inside to one side thinking I connected it right

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

Take off the back and replace your memory card

If they are hard buttons, meaning not (software) then yes. The digitizers are usually pretty expensive $100+ and you will need tools to open the tablet. ifixit.com has tools. You may need to get the parts from ebay though.

One thing i could think of is that the cover was put on the wrong way or not on far enough. So that would cause the web came to not focus on you.

Turn the tablet all the way off, press and hold the VOL - and power at the same time for 8 to 9 seconds, it will show a green android guy with a system recovery menu. Use vol - to go down to Wipe Data/Factory Reset, press the power button to select it, go down to 'yes' to confirm, press the power button to select it, it will wipe the tablet, you then press the power button on 'reboot system'.

it's the computer. needs reset in set

i have coby kyros mid7010-4g tablet
it just load the coby logo then penguin logo then android_ text
i tried the factory rest ( power + back + home ) ..
it gives " Unexpected updater mode! Please reboot your device.
How do i proceed from here Any help please.

It might be the version of the Android on it. If you use Android 2.1, then you have to upgrade it to Android 2.2, then you will be able to play Flashcontent.
But bad news is, that you have to wait, until Coby releases an Android 2.2 upgrade for Kyros (http://www.androidtablets.net/forum/coby-tablets/3663-coby-kyros-7015-tablet-questions.html), because if you upgrade your tablet PC from elsewhere, then it might be malfunctioning.