Search results

Can you suggest a next step? Ive got a new U9580 (TPS62180 on order) as it is not outputting yet it has input powered 12.6v and enable 1.8v

Revive appears to timeout with "System cannot be restored on this device - Gave up waiting for device to transition from DFU state to DFU state". Even "Restart Device" which I consider a safe option fails with message "Configurator could not perform the requested action - Apple Controller...

I wondered. Is the idea to restore? Does this wipe customers files - as the screen message alludes to?

pp1v2_awake 1.2v pp1v8_awake 1.8v pp3v3_awake 3.3v ppvddcpu_awake 0.75v pp0v8_slps2r 0.8v pp1v1_slps2r 1.1v pp1v8_slps2r 1.8v Tried to get DFU mode via instructions on https://logi.wiki/index.php/DFU_Mode_Restore_(Macs) AND via momentary short of SWK003 to no effect on A1502/BigSur/AC2. Then...

Diode mode on pp2v5_nand_ssd0 is 0.35v

20v 30mA on all USBC Dead machine, corrosion on C9583, C9584, both replaced but pp2v5_nand_ssd0 still 0v U9580 reflowed then lifted and refitted - no change. Board otherwise immaculate. ppbus_g3h 12.6v pp3v3_g3h 3.3v pp5v_g3h 5.1v pp1v8_slps2r 1.8v pp1v8_slp2rsw_dfr 0v pp1v8_awake 1.8v...

Hi, all solved after doing a better job of soldering on the U7100. Thanks for your help.

Ooops spoke too soon. During every boot as it is increasing current gain it shuts off every time just as it goes through 2 amps draw. Still shuts off booting with battery disconnected. Still shuts off in SMC bypass mode.

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...