My iMac doesnt start - Black screen

iMac 27" EMC2546

Hello!

I have a big problem with my iMac.

I can´t start the iMac - there is no gong, fan or something else. Always black screen.

These things i have already done:

- SMC reset

- cleaning the fan

- change the power supply

- change the battery on the logic board

Now i dont have any ideas, what i can do.

I don´t hav a garranty for the iMac - it is from 2013.

If anybody have a idea, please let me know!

kindest regards

Klaus

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 2

crwdns2944067:02crwdne2944067:0:

Did you solve your problem? I have the same problem except that I can hear the gong.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

Tell us what the diagnostic LEDS on the logic board are telling you.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0