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I tried, still the same pulsing, USB ports look fine, any other ideas?

Yes, when I do a bypass, the fan spins for 2 seconds, stops for 2 seconds, starts for 2 seconds, keeps repeating. pins 7 & 3 pulses as well.

PPBUS_G3H - 8.56V PPVRTC_G3H - 3.3V PP5V_S5 - 5V PP3V3_S5 - 3.3V PP3V3_S3 - 3.3V PP3V3_SUS - 3.3V PP5V_S4RS3 - pulsing, vcore pulsing as well, no short to ground. I checked all the SPI traces and resistors, re-programmed bios with clean ME. Any idea what to do next? No water damage just...

pin 1 = 28.9mv pin 15 = 5v pin 24 = 5v pin 40 = 5v

The board stays on in normal mode, minus the vcore of course. r7402, 7mv on pin 1 and 12.60v on pin 2. Even in SMC bypass, it measures the same Also, resistance is 55k, which should be 90.9k, so I removed the resistor out of the circuit and it measures 90k to be sure it's good.

3V3_S5/SUS without bypass is 3.3v and SMC bypass is 3.3v as well. AVREF_SMC is 3.3v with and without SMC bypass I get voltage on all coils except the PPVCORE_S0_CPU_PH2 or PH1 and PPVCORE_S0_AXG_R in normal and in SMC bypass Also noticed ppbus_g3h is 12.6v normal but in bypass it's 12.33v, I...

no pulsing PM_SLP_S4_L it's a steady 3.3v, SMC bypass board stays on "fan stays going" I do get 3V3_S5 and 3V3_SUS 3.3v each.

No pulsing all, when charger connected or triggering SMC_ONOFF_L, SMC Bypass, the fan does come on but no boot or chime. Is it something with the bios/traces or clock signal?

Hello, This board was liquid damaged, repaired and working. Somehow a screw dropped on it sometime after, no idea how they pulled that off. Anyhow, I was missing PP5V_SUS and Q7840 was replaced, PP5V_SUS came back. Sometimes the fan tries to move bit stops, it's not even a quarter spin, it's...

Hello, This board was liquid damaged, caps: c5025, c7526,c7525 was covered in liquid stuff. Also, U7200 was covered as well. Replaced the caps and cleaned up the area and had to replace u7200 as it was blown. Board boots and works fine all expect the camera and for some reason when I try to...

Can HWMonitor be trusted? System total taking 47W, CPU VccSA 7A, GPU Die 236c insane numbers.

It reports both GPU's the intel and the GT 330M, I am going to assume there is no fix other than disabling the NVIDIA GPU via some hardware mod?

Before swapping out cap: Do you note VCORE dropping 0.2-0.3V few seconds after start? - yes, 1v then drops to .8v Is better to confirm USB activity with OSX pen drive, with LED Link; if flashes OK. - I have a USB stick with a LED on it that contains High Serria install, no flashing from it...

Hello, I have an 820-2850 with no image and also doesn't chime. Using 85w MagSafe official apple charger If I take the memory out, it will beep and if I connect a mouse, it does light up. I have tried another display as well to rule out a bad LCD. No liquid, the board just stopped...

UPDATE on this and how it was SOLVED. Short version, swapped SMC, firmware now updates and running on the newest OS with no issues. Long version: I found a way to manually push firmware updates to the BIOS. You can get the firmware from unpackaging (Program such as unpkg) the install...

I have tried another SSD, again, while installing, I get the black screen with a white apple logo and the install bar which makes it just a little past the starting point, the screen goes blank and the fan gets stuck in the start stop start stop and never comes out of it. For kicks, (Battery is...

I ran ASD EFI and selected all 64 of 64 test. They all passed.

Update on this. I can not complete an OS update from Mavericks (OS that came with the device) or install High Serria. I would assume it is the BIOS, wondering where I messed up. I can do an internet recovery and install the OS ( which is Mavericks ) however when I try to install an EFI update...

ok, just making sure, I ended up using the SN from a donor from China I had that matched the board I had, seems to boot, I'll try installing an OS later on. thanks!

This worked and the MacBook air now boots, but I need to update the serial number to the correct one. I made 3 copies of the old bios before updating it with the clean ME bios found on this forum. Now the issue I have is, I want to update the clean ME bios with the serial number from my old...