Chosen Solution

Hello everyone, I am a little outdated in apple repair. I am a certified apple repair technician and used to do work at an apple authorized repair center, now I do mostly PC’s instead. I have a problem that has me stumped and I feel like it is something simple I am just missing. I have an Imac that originally came in with a blinking folder indicating a likely failed hard drive (which I confirmed with a hard drive test) When replacing the hard drive, the sata jack became seperated from the board. I was able to slide it back in and it fell into place fine. However, upon turning the computer on the display will come on for roughly 3-5 seconds and it either turns the blacklight off or the entire screen goes off. The diagnostic LED’s are all on fine. If you boot to a CD it will boot fine, I know this because if you boot to a CD and let it go to sleep and click the mouse the screen will turn on again for 3-5 seconds and turn back off. With this issue I have: Reset the SMC Performed an NVRAM Reset Replaced the LCD Cable with a known good cable Replaced the inverter with a known good inverter Replaced the logic board with a known good logic board The Imac is an Imac 20" 2.16 Ghz Intel, MA589LL/A and W870846TVUV I suppose the only part I can replace at this point is the LCD Panel, but I feel like this problem is much more simple than I am letting it on to be… Any advice would be appreciated

First hook it up to an external monitor to help isolate the problem. If that works, get the hard drive formatted and a system installed. Run diagnostics from the original system installation disk, “D” key and let us know your results. Sorry to hear you have to work on PCs ;-(