White Screen After upgrade
I recently upgraded my, hard drive to an SSD, RAM to 16GB, and CPU to an i7. The upgrade went well.
The iMac booted up and I installed Mountain Lion. Then upgraded to Catalina. The computer worked great for a week really fast.
Then it got stuck trying to close a program. I waited for about 15 minutes and then when nothing responded I did a hard restart. Now I get only a white screen on boot with the chime. Here is what I have tried:
- Restart with D pressed- nothing
- Restart into safe mode (shift) - nothing
- Reseting the PRAM - Chime and white screen for a second then reboot. Still at white screen.
I have removed the display again to look a the diagnostic LEDs. They look normal. Single when plugged in. Second on boot, third quickly follows and no fourth. I replaced the display and all four LEDs light.
What additional steps can I try?
It seems really odd that it was working for a week with no issues but now won’t boot.
RAM and SSD are from OWC and the CPU was purchased used.
I swapped the other CPU back in but still nothing.
Thanks for any help or suggestions you can provide.
Here are the images of the display connectors.
Ist dies eine gute Frage?