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    iMac - 27" - Late 2015

    Hi Team, I received a iMac 27" Late 2015 in my store last week. The issue with this iMac is that it starts up and as soon as the Apple Logo appears the progress bar reaches to almost 20% the iMac just shuts down. If i try to press option and turn the computer on, it stays at the HDD icon, but...
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    820-4924 - A - No fan spin - Green / Orange light present

    Hi Team, I have a MBP early 2015 A1502. When the computer power button is pressed the chime is heard but nothing seen on the screen. Customer mentioned that they bought a Chinese Charger as the original charger was not available in the store. Inspected the board and found that some solder...
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    [SOLVED]820-3476-a

    Hi Team, Need help with this situation. This is my personal computer. Computer was working fine. Next day morning computer comes on but does not accept password. Keyboard types but computer does accepts password. Now here is what I have done so far. 1. Connected external keyboard and...
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    820-3926, startup chime, no boot.

    Hey guys, I have a 820-3926 here that has startup chime but, doesn't boot. I even tried booting with an external hard drive and also resetting the NVRAM, neither solved the issue, all it gives me is a plain white screen. Any further troubleshooting advice?
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    Mac Mini recognizes earphones, but doesn't play sound through them.

    Hey guys. I have a mac mini here that plays normal sound through speakers and external display however, when earphones are plugged in, it shows that the earphones are connected but it doesn't play any sound through them. The I/O bezel and logic board seemed good, so i went ahead and set up a new...
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    820-00165 dead board, no fan spin, and no light on the charger either.

    Hey guys, I have a Macbook Air board (820-00165), there is no light on the charger nor fan spin. I proceeded to check the power rails, and realized PP3V3_S5 is missing. I also checked PP3V42_G3H, which is present despite of no light on the charger. Any further troubleshooting tips?
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    820-3476 - Green light but no fan spin

    Hi Team, Received a Macbook Pro with board 820-3476. The green light turns on and then turns orange, but the fan does not spin. I checked ppbus_g3h and i get 12.58v. Can someone advice me further to trouble shoot this board. Thanks.
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    Machook Pro - 820-2879

    Hi Team, I have received a Macbook Pro 820-2879 where the computer works fine, just that the Audio does not work. If gone on System Preferences >> Sound >> Output >> No output devices found. Input >> No input devices found. I thought that it could be a Software issues, so I went ahead and...
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    Success Stories - 820-2850 AND 820-2936

    Hi Louis / Duke and the entire Rossmann group, I would like to share 2 of my success stories with you guys. Last week I had 2 computers which were dead. I watched a couple of videos of Louis on the one wire circuit and very patiently and using brains went ahead with the 820-2850 checking...
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    [SOLVED]820-3115 logic board

    Hi Team, Today morning received a Macbook Pro with 820-3115 logic board. The customer complained that last night he was watching a movie and then it just shut down, so he thought it was the battery and kept it to charge the whole night, but the computer will not come on this morning. When the...
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    iMac - 27" - Mid 2010

    Hi Team, I have a 27" iMac - Mid 2010. I ran the EFI Test on it and I get the following error. Voltage (VG0R) -- MXM (test 1) - Error - Sensor is reading below the low limit Test Failed. As I don't have the schematics for the iMac logic boards, can anyone point out for me as to where to look...
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    [SOLVED]Macbook Air Mid 2011

    Hi Guys, Yesterday I received a 13" Macbook Air - Mid 2011, where the customer complained for No Sound. I checked in the System Preferences it says " No output devices found " and also " No input devices found ". I went ahead and took a backup of the customer and then went ahead and formatted...
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    Macbook Air - 820-3437

    Hi Louis, Duke, and group, Yesterday I received a Macbook Air - 820-3437. Only closely looking at the logic board I do not see any liquid damage to the board. When I plug in the charger I can see the light comes one with Green and then turns amber. The fan as usual spins, stops, spins, stops...
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    Macbook Air 820-2796

    Hi Louis, I received this Macbook Air from a customer which the customer complained is not coming on. I opened the back cover of the Macbook Air and the fan was spinning but there was no display. I went ahead and removed the logic board from the Macbook Air and closely looked it under the...
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    Macbook Air - 820-3435

    Hi Duke / Louis, I received a Macbook Air which was not turning ON. Customer complained that her daughter spilled very little liquid on it. I opened the computer and also watched a video by Louis that how a trackpad can make a Macbook Air not turn on. I followed the instructions and saw that...
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    [SOLVED]820-3437 - PPBUS_G3H is showing .OL on multimeter

    Hi Guys, Today I received a Macbook Air 13" which is not coming on. I checked the power rails and found out that the PPBUS_G3H is showing .OL on the multimeter. Now here is what I did. I measured every component where PPBUS_G3H should be present, and it measured as .OL. I understand that .OL...
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    820-2936-B - Green light on, Fan does not spin

    Hi Group, I have a 820-2936 -B logic board where when I plug in the charger I get the green light but the fan does not spin. I tried measuring all the components with PPBUS_G3H, and everywhere I get is 12.56 volts. Also on further measuring the power rails I found the following that PP5V_S3...
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    [SOLVED]820-3476 No display

    Hello, I got a 13" Retina Display computer that does show anything on the display. The logic board is 820-3476. When the adapter is plugged in the light on the adapter comes on and the fan spins. On inspecting the logic board I see that Q8150 is corroded. Other than that the logic board...
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    [SOLVED]13" Macbook Pro Retina - Early 2013.

    Hello, I have received a macbook pro retina display - early 2013. The problem with this macbook pro is that the trackpad is laggy. The desktop loads very slow. After a while the screen just moves from the desktop screen to the widget screen. The computer stays on if on charger, but if...
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