Has she finally given up?

Hi…

So, on returning home one evening i noticed my Imac had shut itself down of its own accord… (i had left the computer on when i left in the morning…)

Then upon trying to turn her on (phrasing) she began to boot till about 2/3’s the way up the loading bar, then the machine turned off completely… this happened on every attempt i made to turn it on…

It will however load up in recovery mode and also in target disk mode

When i tried to boot it up in Apple Diagnostics, it came up with the ‘!’, so i am leaning to the fact there is a hardware issue, but the harddrive is viewable on another mac in target disk mode… so it can’t be that? Or?

Does anyone have any solutions…?

HEELLLPPPPP?

in hope,

Paul