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MacBook Air 820-3437, shows no signs of water damage, but the owner thinks he might have spilled something in it for a long time ago. The board looks completely clean. It starts fine without the IO board flex cable, but as soon as i connect the IO flex it won't start anymore. I have tried with...

The Caps Lock light on this board doesn't work. Caps lock works but no light. I have tried different keyboards and still the same.

Getting really frustrated by this board and I need someone smarter than me to explain what is going on. When I got the board it was water damaged but started with RAM beeping. I found that there was no PPDDR_S3_REG voltage, and there was a short on the rail. I have now replaced every capacitor...

It's seems to me that all power lines needed for this to start are present: - PPBUS_g3H = 8,6V - PP3V42_G3h = 3,41V - PPV5_S5 = 5V - PP3v3 = 3,3V - PP3V3_S3 = 3,3V - PM_SLP_S4_L = 3,3V So whats the next step here?

Just replaced SMC and U7000 and the MacBook now works fine except the audio output on headphones is really low. Anyone seen this before?

Got this with broken backlight. 12.3V on backlight. Replaced U7700 and Q7701 and I now have 52V on backlight output but still no backlight. I have reset the PRAM but still no luck. I have also tested with a 2013 LCD but still the same. Am I looking at a bad LCD screen here?

Badly corroded around U7100 and no PPBUS_G3H. Removed the old one, added a few jumper wires and soldered on a new U7100. It now starts and works fine, the problem I'm having now is that it always "detects" a charger even if not connected. It senses wether I'm using a 60W or 85W charger but does...

First off, completely dead board (another thread). Got the board starting but fan spins constantly with no light on USB mouse. No CPU VCORE and PP1V05_S0 at 0.2V. Found a short on U7400 and replaced it. Now i have PP1V05_S0 But still no CPU VCORE Found that All_Sys_PWRGD was missing so I...

Dead board, supposedly water damaged but the board looks totally clean, almost like new. Got all main power rails, but PP3V3_S0 is jumping between 0.06 - 1,25. It's like the board is trying to turn om but then decides not to...

Managed to rip off a couple of the pads on the MUX while wicking, I don't have a donor card for this, is there another card that has the same MUX, or can I buy a new one somewhere?

I have an 820-2530 that came in today totally dead but green light on the charger. The logic board showed no signs of water damage at all. PPBUS_G3H was 1,5V and Pin 1 on U7000 was only 6.5V. Removed U7000 and the voltage raised to 16.5V on pin 1. With a new U7000 I got 12.5V on PPBUS_G3H and it...

I have this 820-4924 with Trackpad/Keyboard not functioning properly. They are both working some of the time and suddenly freeze up. There are always clicking on the trackpad but both trackpad and keyboard works sporadically. I haven' got schematics or boardview for this and I don't even know...

I now have more MacBook Air working Logic boards than I have cases to put them in. I was thinking it would be cool to make some sort of "Mac mini"/media center out of them but I don´t want to put a trackpad on there just to relax the fan. Is there a way to trick the thermal sensor circuit?

Got this Mac Mini today with a ripped of fan connector, not on the logic board but from the fan wires. I have taken the connector of an old A1278 fan but I can't tell which pin goes where. I have tried some different places now an got the fan to spin but I don't know if tach and controller pins...

Got a MacBook Pro 15" 2010 yesterday, I was informed that the USB ports where dead. There is no water damage as far as I can tell and the previous owner said he probably overloaded the USB ports with USB hubs. I have got both USB ports working again, both L4605 and L4610 where open and got...

I thought I was finished with these old boards now, but unfortunately my nephews MacBook Pro lost it's Wifi. The board shows no signs of water damage. L3401 measures fine L3404 measures fine and have 5V on each side U3401 have 3V on output I have tried with both another Airport card and...

Got this MacBook Air 2014 today. It is slightly water damaged, I can see some corrosion around U5450 (replaced this) and at the trackpad cable (cleaned this one). It turns on when connecting the charger, the fan spins high all the time. It only has green light some of the time, it does not see...

This board came in completely dead, no green light or anything. Made a visual inspection of the board, and oddly enough there where no sign og water damage at all. The U7000 had a small crater on it so it got replaced. After replacing the U7000 I got green light and the fan started. Mounted the...

I'm kind of stuck with this old 820-2530 board. When plugged in the light on the charger is blinking. PPBUS_G3H i fluctuating between 3.5V and 11.5V, at least this is what i can read on my multimeter. I guess something makes the charger start and stop. It does not run on either battery or...

Just got this iMac. The owner claimed instability which I used quite some time to reproduce. I let the iMac run Heaven 3D benchmark for about two hours before the iMac just cut off. Started the iMac again and started the benchmark again and it lasted for about 10 minutes before cutting off...