Hi everyone. I recently replaced my 3.5 HDD with a 2.5 SSD. The problem is that after my iMac screen was black. I tried to...

Hi, here is the link for the circuit I used to solve the problem: https://www.digikey.com/product-detail/en/BLM18PG221SN1D/490-5221-1-ND/1948397

Solved! After almost 3 years, due to the fact I was unable to stop and take my Imac for Repair since I work with it to make my incomes. —— Basically the issue happens because the L9000 Circuit burns if you misconnect the LCD Display cable. I followed all the hints to check the LED Start sequence as you can see on this LCD Backlight not working = solved to this problem. I noticed that LED4 was not blinking on the startup sequence. —— I connected an external display using Displayport and the Mac was running fine on it. —— The next step was to buy the circuit from Digi-key, as mentioned by Yako on this Damaged display power header whilst replacing hard disk drive. You can buy the 220 OHM Ferrite Circuit here. —- Next, I took my iMac to an electronics specialist who confirmed that the Circuit was burned. He welded it again and TADA, LCD working again! —— SOME TIPS: —— a) The L9000 Circuit is below the GPU. So you will need to remove the logic board and the GPU (the whole thing with the cooler, etc.) Check the...

Solved! After almost 3 years, due to the fact I was unable to stop and take my Imac for Repair since I work with it to make my incomes. Basically the issue happens because the L9000 Circuit burns if you misconnect the LCD Display cable. I followed all the hints to check the LED Start sequence as you can see on this LCD Backlight not working = solved to this problem. I noticed that LED4 was not blinking on the startup sequence. I connect an external display using Displayport and the Mac was running fine on it. The next step was to buy the circuit from Digi-key, as mentioned by Yako on this post. You can buy the 220 OHM Ferrite Circuit here. Next, I take my iMac to an electronics specialist who confirmed that the Circuit was burned. He welded it again and TADA, LCD working again! SOME TIPS: a) The L9000 Circuit is below the GPU. So you will need to remove the logic board and the GPU (the whole thing with the cooler, etc.) Check the picture below to see where the Circuit is located b) I Paid something like...