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Thanks Duke, I am out of town will post response tomorrow.

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...

G.Beard Hi, The solution that you provided worked. Thanks so much for your help. Appreciated. Regards, Raj.

Thanks G.Beard, let me try that. I will keep you posted. Thanks. Raj.

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...

Hi Louis, I received the new keyboard and changed the keyboard. After replacing the keyboard still the trackpad does not work, neither does the trackpad work. The fan is spinning at a very high speed than normal. Can you please help me out. I am lost and confused of what to do next. Please...

Hi Duke, As i progressed in checking the traces, I noticed that the continuity between R6111 ( Pin 1 - SPI_CLK_R ) to R6113 ( Pin 2 - SPI_MISO_R ) is missing. If i run a jumper wire to maintain the continuity of the traces, would that help. Or I have to change the resistor. Please advice. Raj.

Hi Duke, Tomorrow I shall check all resistors and its traces and give you the feedback. Thanks.Raj.

Hi Duke, I checked the R6110 and its traces. The traces of Pin 2 of R6110 end up at 3 points - R6120 (Pin 1) , R6125 ( Pin 2 ) and on Probe point TP[1] SPI_CS0_L. They all beep in continuity mode of the MM.

Hi Duke, I disconnected the IO Cable ( the IO cable is the cable that is a Flat ribbon, that runs on the top of the fan ) correct me if i am wrong. I did not connect the trackpad cable. Connected the USB mouse but there is no light on the USB Mouse. Also the fan does not spin 3 times, it...

There is no water damage on any part of the board. I checked J6100 and U6100 and nearby area, no traces of water. U1950 also cannot be seen with any water damage.

Hi Aprendiz Chime - No chime Caps lock - Doesn't work Use a flashlight - I did put the flash light on the back and there is no image. Raj.

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...

Hi Louis, The place where the corrosion is very dense and many of the traces are broken. I tried to fix the traces on the logic board by checking the continuing but then was not successful. So I asked the customer if I could change the logic board itself, where I found one for $ 99.00. I...

Hi Louis, I have not replaced any of the corroded components neither have I seen if there are any traces that are broken. As a matter of fact I was watching a video that you have uploaded to see how you are fixing the corroded traces...

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...

Hi Louis, I have ordered a new keyboard, which later I will plug it and see if that solves the issue of Keyboard and Trackpad working back to normal. I shall leave this open till I get my new keyboard and then we shall continue with our chat. Thanks .

Louis, I even changed the cable that runs from the Trackpad to the Logic Board.

Well, the keyboard is original, but i had to change the trackpad as one of the cables on the trackpad - the two tiny connectors on the side - one connector ribbon cable had broken. Hence i changed the trackpad.

Louis and Aprendiz, I tried to press the option key and then turn the Macbook Air on 820-3435, but the option key does not take the Macbook Air into a different screen and also the Caps key does not work. The voltages on Pin 10, 19 and 20 have been mentioned in my previous post. Is there any...