mac mini(2010) can not bootup

I have an old mac mini (2010 type) memory has been upgraded to 4M hard disk 110g used, 2g free left yesterday when I reboot the mac mini it always displayed the small circle then shutdown automatically. I try to press key 'shifht' to enter safe mode

but result is same, it shutdown automatically after 2,3 minutes, there is no logon window display.

I try to press key 'Shift' to enter 'disk utility'.

verifying the disk also failed.

Your comment welcome

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