My son jailbroken iPad won't turn on?

I jailbroke my son iPad and he some how found the reset section and clicked reset all content and settings and since then the iPad has been stuck like this ( in the picture ) . I tried pressing the home button and the power button at the same time it didn't work I tired it again but just letting go the power button still didn't work I tried connecting it to the computer but it still didn't work idk what else to do please help! Thank you in advance:/

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