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Hello, I have a mac pro that its working backplane was sold from my customer and he has installed a non working one and brought it for repair, so far I know that everything else was working. My only chance for fix is to test another bios [I have fixed one before]. So far I have made a dump of...

So I had this with gpu issue after some time at OS. Also VST was failing. I did noticed that it was going too slow at gpu benchmark before it crashed. I replaced 216-0810084 with 216-0810005 and after that I wasn't able to boot at OS. I placed a second good one 216-0810005 [I know that from this...

So I have another one of them with 216-0810084 GPU that has a spinning fan but no chime and no signal/ backlight. I started by heating a bit the GPU but there was no difference. I have cpu vcore and gpu vcore. My only notice is that similar boards when they start they spin the fan for a couple...

The MacBook had spilled liquid and the issue is that after some cleaning and replacing C5125 now chimes and display image but no backlight until I close and open again the display. After that it has backlight but if I close again the display the backlight doesn't go off. I couldn't find any...

I have two same 820-2915-B [with 216-0809000] that have same problem, they chime and even start OS [I can hear volume up/down with 10.9] but they give no signal at display and no backlight. I have disconnected LVDS and tried with display port but without luck. The first one had lines at display...