iMac 2017 4k issue

[antoniomac]

I have a 2017 imac 21.5 4k that crashes often.
Often the display goes black and the two diagnostic LEDs on the mainboard go off
I replaced the power supply with no benefit
Tips?
Thank you very much

 

[Fishrrman]

Bad graphics inside...

 

[antoniomac]

Bad graphics inside...

Can it be fixed?

 

[rpmurray]

Can it be fixed?

Nope. GPU is soldered to the logic board.

 

[Nguyen Duc Hieu]

Can it be fixed?

Yes, replace the logic board.
More hardcore is replacing the GPU chip. But this is not a thorough fix, the repair shop needs to check for other failed components. It's time consuming and sometime without result.