[SOLVED]iMac "Core i3" 3.06 21.5-Inch (Mid-2010) shutdown at 20 seg

[MDY]

iMac "Core i3" 3.06 21.5-Inch (Mid-2010) shutdown at 20 seg
everymac says GPU is HD 4670. I dont know which 216 number is. I think 216-0729051 Normally this is GPU problem?

 

[aprendiz]

Try boot from USB first, if it does not work, heat up GPU a bit.... and yes it is 216-0729051....

 

[MDY]

Yes, you were right. Was HDD. So imac then hdd has problems they will shutdown....