crwdns2934243:0crwdne2934243:0 Dan

crwdns2947189:0crwdne2947189:0:

How to best diagnose a dead screen vs. the graphic card

crwdns2934249:0crwdne2934249:0:

I have a 2013 iMac 27" which suddenly started to display a blank / black screen. It is definitely  running as I can hear the chime at power on and the fan and hard drive making noise. I have tried to boot into reset / diagnostic mode and check that the ram was seated correctly, still nothing.

I should mention that an external monitor will not work either and is the reason why I question if it is the screen itself or the graphic card...

What is are there best methods to diagnose the graphic card vs display? Can I run any diagnostics without removing the screen?

Thank you,

crwdns2866306:0crwdne2866306:0:

crwdns2915684:0crwdne2915684:0:

open

crwdns2934241:0crwdne2934241:0 Jayson Wonder

crwdns2947189:0crwdne2947189:0:

How to best diagnose a dead screen vs. the graphic card

crwdns2934249:0crwdne2934249:0:

I have a 2013 iMac 27" which suddenly started to display a blank / black screen. It is definitely  running as I can hear the chime at power on and the fan and hard drive making noise. I have tried to boot into reset / diagnostic mode and check that the ram was seated correctly, still nothing.

I should mention that an external monitor will not work either and is the reason why I question if it is the screen itself or the graphic card...

What is are there best methods to diagnose the graphic card vs display? Can I run any diagnostics without removing the screen?

Thank you,

crwdns2866306:0crwdne2866306:0:

iMac

crwdns2915684:0crwdne2915684:0:

open