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To run a Memtest the logic board need to be able to boot on an OS right ?

Hi 2informaticos ! Thank you for your answer. I am just getting back to it today, and actually I can't finish the OS loading. The artefacts comes while booting and seems to freeze the Mac. I guess that if it's iGPU related it's game over for this board. But is it if it's RAM related, how...

Hello, I have here a 820-00165-A from a MacBook Air A1466 with a strange issue to me. At the beginning, the board was not powering on, no liquid damage. After further mesurement, I replaced the SMC and since this, the board powered on, can boot, but artefacts come very quickly after boot...

Yes, ALL_SYS_PWRGD present 3.2V

Hi Rossmann's repair group crew, Here is the behavior of the board : when I plug the charger, it ramp to 20V 150mA, stay there for 10 sec, then 20V 0A for a few seconds, and finally goes back to 20V 150mA and stay there. There is obviously no image, no CPU activity, just the fan spin for 3-4...

I am using Amtech flux from Rossmann store so I reckon it's not crap flux :) and I cleaned the board twice in a ultrasonic cleaner so if crap was there it would be gone indeed.

Do you think it worth the try to heat more the PCH ? I don't want to destroy it, more of that it could be something else than the PCH that I have no find yet...

Hi, I've tried first to heat PCH without any changes, then replace R1301 with a 330k, still no fan spin (no I have PCH_INTRUDER_L = 2,5V)

PM_BATLOW_L = 3,3V PM_PWRBTN_L = 3,42V PM_RSMRST_L = 3,04V PM_DSW_PWRGD = 3,12V PCH_DSWVRMEN = 2,50V SMC_ONOFF_L = 3,4V I'm not sure about the 4 PCH's RTC signals you mean, but there is the following : PCH_INTRUDER_L = 1,66V PCH_INTVRMEN = 2,5V PCH_SRTCRST_L = 3,27V RTC_RESET_L = 3,27V

They are both 3,3V

Hello, I have light on charger, but no fan spin. Historic : Macbook was find in a dump, no fan spin but after cleaning the backlight keyboard connector it worked fine. I ultrasonic the board even if it looked clean, but 2 months later I have this problem. PPBUS_G3H = 8,6V PPDCIN_G3H_ISOL =...

Hi ! You can close this tread, I released the Mac. Thank you

Up :)

Good call diag mode. I have 2 error codes, PFM006 related to the SMC and PPN001 related to the power management. I don't have any SMC for this board to try right now, but if there is crap under the SMC maybe a reballing would be enough. Before, do you have a good board like this to compare some...

The only thing strange is the "Heatpipe outgoing Air" sensor, which is fun because there is no heatpipe on these...the temp is 128°C. Also it shows me 0.00V on something called "Mainboard S0 Rail", I don't think it makes sense, the Mac wouldn't run if it was the case.

Hi ! I hate to work on this board, no fan spin = no fun. The board was liquid damaged, came here with no image. I refurbished the LCD connector that had minor corrosion and replaced the flex, LCD came back. When LCD went back, I discovered there was no KB no TP, the TP flex was damaged so I...

Ok i find a stencil as the reference SR16Q. It will arrive here in two weeks or so, I'll let you know if the reparation is a succes or a disaster :)

Hi, so to let you know the end of this, I removed the CPU properly and the short is gone, so the problem was the CPU or the connexions to the CPU. I know it's a pain in the ass to reattach a CPU to a motherboard but I have time to spend on it and it worth the try as I have some junk 820-3437-B...

haha exactly like a massage at a wood foot ! I'l try it and let you know at least if the short was coming from there. I would be very sad to remove the CPU and still have the short...

Alright so your guess is reballing CPU ? Maybe dead CPU ? No way that I am doing a reballing CPU for a 3437-B, neither a CPU swap...