No External Video after PRAM Reset?
I call upon the IFixit Sages! I am recovering a friend's MacBook Pro 13" Late 2011 MD313LL/A damaged by spilled water. I know I put Early 2011 in the Device block above, but that is because all the internal parts are now from a MC724LL/A I purchased for parts to fix the MD313LL/A! As soon as I opened the water damaged MD313LL/A I found the Logic Board badly corroded and knew it needed to be replaced.
I tested the MC724LL/A and found it Option booted to Internet Recovery, but would not complete the process due to a bad hard drive. The Hard drive from the MD313LL/A did successfully boot without issues. That would solve the problem except for the broken right hinge mounting point on the screen and the dented mid-body just to the right of the Trackpad, making it impossible to click even though the cursor moved. I subsequently used this track pad successfully in the body of the MD313LL/A, replacing the water damaged one there that did not work.
I proceeded to replace the parts one at a time starting with the LB. I immediately discovered the LCD did not work and I had no video at all. I had a Thunderbolt External Video Adapter for external display. I purchased a replacement LCD display and after connected, I now had external video, but the MacBook Pro display still did not work. I also did not have working speakers. I performed a PRAM reset that restored audio, but now I no longer had keyboard backlight. I still considered that a win. I did not lose external video with this PRAM reset.
I continued replacing parts one at a time, but at each step I could only get to a Gray Screen with nothing else. I continued replacing parts one at a time without joy. After I replaced all the parts from the damaged MC724LL/A into the perfect body of the MD313LL/A and still could only get the Gray Screen I tried a second PRAM reset. This time I lost the external video. I have tried disconnecting the battery, SMC resets and numerous PRAM resets with no joy.
What can I do now? Did the LB fail? Did I somehow brick the LB? I hope there is a Wise IFixer out there that can lead me around this to finish the job or tell me it is hopeless and for me to move on. I also have USB Flash Drives with Lion and Yosemite on them that I used along the way as well, but they nor Internet Recovery would get me beyond the blank Gray Screen. On my first test of the MC724LL/A Internet Recovery, the MacBook Pro went a menu to reformat the disk, reload Lion and other choices, so I know what it should do for Internet Recovery after downloading the initial interface. Also, is there any way to test the LCD screen? I only have the word of the guy I bought the LCD screen assembly from that it works. I knew something was wrong with the original MD313LL/A LCD screen as there was no external video until I replaced it.
IFixit is great! I could not have gotten this far without the Guides here. I just hope there is some Wise person out there to take me home or tell me to move on as the issue cannot be fixed. thank you all in advance!
Questa è una buona domanda?