Search results

I put the board in topcase of another mac, same problem.

Yes, keyboard and trackpad working normally. I'll get another machine to test. I give news.

board is ok. Tried changing trackpad and cable, also disconnected webcam. I ran HWMONITOR and the System Proximity sensor marks 128º. Apple test found problems with SMC (PFM006) and power supply (PPN001) Some help?

AVREF_SMC 3.3 and SMC_RESET_L 3v

Perfect board, no oxidation and no shorts. Missing several lines. I'm using original 85w magsafe. In SMC bypass mode, the Mac turned on and I have normal voltages. PPBUS_G3H - 12.2v PP3V42_G3H - 3.4v *PP5V_S5 - 0 *PP3V3_S5 - 0 *PP3V3_SUS - 0 SMC_ONOFF_L - 3,37v PPVRTC_G3H - 3.3v RTC_ RESET_L...

That's what I suspected! Thank you very much!

both with 0.65v

I don't have a history of the board, it doesn't have oxidation. PP1v35_s3_mem = 1.35v I never got a case of A1398 with beep in memories. Some help?

One more to note. I tested it with continuity and I didn't suspect it.

Stable C7140 at 8.6v. replace the F7140 and turned on! \o/ I'll continue with the tests! thank you very much!

R7113 perfect. Pin 6 - 0v PPBus is now floating, 8.4v, 7v, in some moments it goes to 0 and goes up again!

It only gets worse! LOL The board has stopped turning on at all. PPBus 4v. SMC bypass mode does not work. 17/18 - 3 27/28 - 20 Rebbaling SMC? Board turning into a snowball of problems!

situation has changed! The board now turns on and a few seconds later stops, even without the battery. When you turn on the PPBus it is staying at 8.2, when it turns off, it goes to 8.6v. With the battery connected, the board does not turn on and the PPBus is 8.6v

arrived not working. It has no oxidation, it just had a short on C7434. I replaced it and the board turned back on. But if you connect the battery, the board turns on and off in a few seconds, sometimes it doesn't even turn on. I already tested with another battery, with another DC card. Same...

While checking the voltages on the U7000 I found that the short has returned. I removed the C7685 again and found that the problem was the hole it made in the board. I isolated and soldered otherwise, now the board turned on again. Thanks a lot for your attention and help!

Thanks a lot for the help!

I imagined! After seeing the icons with problems. I didn't expect to have problems installing the system!

With new BIOS, same problem. I noticed graphical issues, icons cut off. Some help?

I looked for the file in the forum, but I didn't find it. This iMac arrived to format, but it has several errors in the installation and does not finish (An error occurred while updating firmware. Quit the installer to restart your computer and try again.). The only version that completes the...

The board had oxidation and an ugly short on the C7685, it even made a hole in the board. I removed the component and the short is gone. In diode mode, the line is 0.200 and PPBus 1v. C3215 LDO lines are normal, 0.500. But I don't have 1v on the ports. Any tips?