Search results

Hello guys, I just got a new board which has no apple logo on startup. It chimes, video is there, the fan is spinning and VCore is present. But it doesn't boot. When I measure the power rails, I get only 0.8V on PPVCORE_S0_CPU_REG (instead of 1.25V). I thought there could be an issue with Q7510...

Hello guys, I worked the past few hours on a 3332 Logicboard and I can't get it back to life. The one-wire circuit is working but there is no PP5V_S4, no PP5V_SUS, no PP5V_S3, no PP5V_S0 power rail. I tried to figure out why but I am stuck. Every time I look through the schematics, I end up at...

Hello guys, i just got a 820-3332 15 inch retina MBP with no video. The Macbook suddenly went black while editing video. When you turn on the Mac you hear the chime but the screen stays black. Can somebody give me a hint whats the problem in most cases at this model? Also I have kind of a...

Hello guys, I have no ppvcore signal on my 820-3209 board. I replaced U7400 and also Q7510, Q7520 and Q7550 but I had no luck. There is still no VCore signal (on L7510) and I can't figure out why. I also replaced R7402 but still no luck (Pin1 of R7402 8.4V - Pin2 350mV). When I plug the power...