iPhone stuck on apple logo screen?

My apple iphone 3g 16 gb is stuck on its apple logo… i’ve tried a hard reboot, i’ve tried holding both buttons and connecting it to my computer… i’ve just been reading countless solutions with none of them that fit my situation i also have the electricity (lightning bolt) problem that disappears after i go to the screen with just the apple logo ps. sometimes when the apple logo is up in has the small circle that it shows when the iphone is normally loading something can anyone help?

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