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Well Ive got a green light and PPBUS_G3H back to 12.55v and CHGR_ACIN 3.8 Fuses back. Fanspin and drives the screen without shutoff! Many thanks

I just removed all 3 components attached to pin 3 and still seeing 1 ohm to ground so lifting U7100 right now :)

C7140 pin1 is 5.3v with fuses removed. U7100 pin1 CHGR_AGATE 15.2 2 CHGR_DCIN 16.2 3 CHGR_ACIN 0 9 CHGR_AMON 0 12 PP3V42_G3H 3.4 13 CHGR_RST_L 3.4 14 SMC_BC_ACOK 0 15 CHGR_BMON 0 17 CHGR_CSO_N 5 19 VDD 5.5 20 VDDP 5.5 26 CHGR_SGATE 4.2 27 CHGR_CSI_N 4.6 ppdcin_g3h...

I see 3.2 ohms between pins 17,18 so looks fine. PPDCIN_G3H_CHGR is 20v and I can see 200khz waves applying then grounding inductor to produce 5v on rhs. Im seeing 5v on pin 3 from voltage divider although text on schematic suggests it should be 13.55v! ???

Board came in dead but I found corrosion over U7100s current sense components C7122, C7120 and C7125. Replaced those caps and got fanspin. Connected screen but found during boot power would shut off half way as current draw rose and would then start boot again etc. Suspected C7120 so removed...

I assumed the same screen would suit any of the logic boards that might occupy a mid 2015 15inch MacBook Pro e.g. whatever their graphics provision. Is this wrong? If you mean I have a mismatched screen and board - is there a document that would tell me what model MacBook a 820-00163 board...

Sorry, what does T-CON mean? Another factor I should have mentioned I am using an 820-00163 to replace a 820-00426. Although I paid for the latter they sent the former. In other words the LCD screen was from an A1398 running with an 820-00426. Ive verified the pinout on the video connector -...

Hi, I bought a 'working board' on ebay but seller left heatsink on and a jolt in transit has caused the video connector to be demolished and 8 resistors/capacitors to be wiped off. These are now replaced, I get POST, fan spins and I can see login on the lcd with the aid of a torch but there is...

Progress at last. That gives me a login screen and I can restart and get it every time :) From reading the forum I assume I need to change SSN somewhere?? with a hex editor [which I assume is the serial number] and fix up checksum (Fsys?) Can this be done without Medusa hardware? What happens...

Ah ok thanks for setting me straight. Would you have a clean ME region binary I can use to overwrite the dirty one? As I mentioned the EFI repo file I examined MBP141_0178_B00.fd following Piernovs instructional video for this MacBookPro14,1 had no MeRegionUpdateVolume so I could not take its...

Just managed to borrow another identical board and borrowed the EFI chip. It did boot from the SSD and get to login screen first go. However next few reboots the progress bar sticks at 70% for a long time and didnt proceed even after 15mins wait. This is the same behaviour that this board gave...

Ive already used ME Analyzer v1.255.0 r226 to examine my logic boards extracted ROM data and I can see the version of ROM is 11.8. My issue is that Piernov's video at 5min45sec is using the UEFITool to examine a file he downloaded from a Github repos ending .scap that is the latest update for...

I have no other machine at the moment. I am just going to try using your previous suggestion of a 'clean ME' but I didnt know how. I've viewed Piernov's youtube [which I find quite unclear. e.g. at 6min33 why open flash image tool to then drop a file in it and then exit without saving???] but...

Is there any way to determine any life in the cpu? Should I see 1.35volts on the output of these FETs at least? After all before I replaced the fets I was seeing 6.66volts on their supply (PP5V_S0) but now the board appears to be in an S5 state! Could you explain a little about whether the cpu...

Customer brought in a dead A1398 with no visible corrosion. Inspected it and found one FDMF6808N with a crater - see photo. Replaced it with FDMF6708 but the other two FET were getting hot as well so replaced all three. Noticed prior to changing them that their power rail PP5V_S0 was at 6.6v...

SSD inserted pp3vs_ssd_flt 3.3v ppbus_ssd_flt 13.06v ssd_en 3.3v ssd_clkreq_l 3.3v ssd_reset_l 3.3v

CD3215 XB = U3200 CD3215 XA = U3100 CD3215 TA = UB300 CD3215 TA = UB400 Voltage (when relevant port powered) Diode Mode PP3V3_UPC_XB_LDO 3.2 0.42 PP1V8_UPC_XB_LDOA 1.8 0.477 PP1V8_UPC_XB_LDOD 1.8 0.443 PP1V1_UPC_XB_LDO_BMC 0v 0.443 PP3V3_UPC_XA_LDO 3.3 0.465 PP1V8_UPC_XA_LDOA...

DFU would not work as displayed above. As a recap the board is stuck at 5volts, 3 USB ports draw around 50mA and one draws zero. The one drawing zero is the top left (XB) when sat at laptop. Out of interest when I put an oscilloscope on the clock signal of the flash memory I can see the burst...

Ive tried both revive and restore and both timeout with message "The system cannot be restored on this device. Gave up waiting for device to transition from DFU state to DFU state.com.apple.MobileDevice.MobileRestore - 0xFA5 (4005) Pardon my use of phone to snap screen image I have the board...

Im trying DFU and I see 'DFU' on host Mac [even without jumping swk003] but when I click update I get message "Configurator could not perform the requested action. Apple Controller devices do not support this action"