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Checked around, all big diodes had pulses and when I came acros PP3V3_S4 it turned on. Now pulling 300-500 mA. Something around DCIN board not connected properly?

No short on PP3V3_S4 pin on the TPS51980 EN present and VIN present. Maybe short on PP3V3_S4 since the voltage is 0.31V instead of 3.3V?

Macbook came in with the costumer not naming one clear cause. The fan spins for 1 second then turns off, it's taking 25mA not entering S4 state. Here I have some measurements. PP5V_S4RS3 = 0V PP3V3_S4 = 0.31V PP3V3_S4SW_SNS = 0.01V PP3V3_S4_TBTAPWR = lowering to 0V Thinking about replacing...

It finally worked! Took a while since I waited for a tool to make a backup of the SSD. Put Catalina on a pendrive and let it restore the os. Thanks slot! One last question. Why doesnt the online recovery method work (while giving weird screen distortions) when the pendrive way does work?

Wont start any MacOS recovery. Can choose wifi, but the loading bar after that does not got further than halfway.

Used your BIOS and cleaned ME afterwards. Verified and all. After starting the ME changed which means the PCH has turned on. I can see some indication of waterdamage near the BIOS connector leading under the RAM heatshield. Any way to remove that thing? Since 500 celsius and 120L/min wont do.

OS on external HDD gives me this. First boots normally, but around a half filled loading bar it starts behaving like this and reboots after ~30 sec

There was a broken trace between R6118 and R6130. Now it boots but with questionmarkfolder. Does not recognize SSD and does not give bootoptions when holding option key. Making a bootable Catalina drive, will update tomorrow!

Is there anything else I can check? Maybe the SPI chip not communicating properly? Short on any S0 subrail? Or confirming dead CPU somehow?

Still no change sorry :(

Tested for USB activity on onboard port. My normal desktop gives a flashing red light. Used a 60W and 85W charger Used 4 BIOSes, cleaned all ME's through medusa and verified every step of the way and also checked if Vcore was present. One of those 4 bioses was the only 820 4924 bios I could...

Yes I verfied it with two BIOSes right now. I can link them but don't know if that's allowed on the forum Summary until now: All S0 rails work as does Vcore (very nice and stable 1.85V) Tried flashing two different bioses all verified and afterwards Cleaned by the Medusa No USB activity nor any...

Medusa arrived together with a regular programmer I've downloaded a full BIOS, made a backup of the current BIOS en flashed the fresh one. I let medusa clean the ME but still no activity on USB or Display. I think I am also not sure about the Vcore. On this model I measure PPVCC_S0_CPU which...

Hi 2informaticos! I ordered the medusa and today it shipped right away. Meanwhile I was wondering if there are some videos on how to erase the current SPI ROM and how to write a full new BIOS to the chip. The manufacturer does not have many videos on that. Do you have any? I cannot seem to find...

Yep Im on it! One question, since I am just starting out I dont have a BIOS programmer I saw you recommending the Medusa programmer on the forum. The first version supports until 2017 models. Any benefit to going for the series 3 instead of the 2? How do I go about flashing the SPI when I dont...

oh sorry, the flashiing was only power, but since it connected poorly it flashed twice which I read as activity instead of power. Got a pendrive with link led which does not flash :(

No capslock react, sadly dont have another known good 2013-2015 Pro keyboard to test atm. No backlight, no image. When connected to an external monitor the monitor recognizes the power of the source but no further data (TV sees a hdmi being used but does not give image). Since USB data does...

The link LED flashes, so there is activity! :)

PLT_RESET_L = 3.32V L4605 reads 5.13V when connecting a lightningcable with an iPhone, looks like this is normal PRAM reset resulted in no chime no image flickering and no change as far as I can tell

It does not spin max, it only spins as if the CPU gets hot, so spins in normal mode and I did a start in normal mode. I see that it probably spun because CPU got very hot. Trying it again now results in no fanspin at all. I do have Vcore. What is the thought process from here? Does the board...