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All good with U4760, rails and signals being transferred one side to the other. Might have to put this aside for a bit and look at it with fresh eyes again later.

0V on CPU core ( 1R50 ). PLT_RST_L going to U2072 doesn't appear to go high. I also lose CPUCORE_PROCHOT_R_L out of U7100:46, it's there for a few seconds ( 20V 800mA->600mA ) and then is asserted low (0V).

UPDATE: U5870 had corrosion on it, replaced, got my 3V0 RTC PLATFORM_L etc all back and get all the way to ALL_SYS_PWR_GOOD, PM_PCH_PWROK and PM_PCHSYS_PWROK and everything "online" but it still doesn't boot. Still ramping the fans too. 1am, time to put it aside and try again tomorrow.

All other LDOs present, LDO_RTC @ 1V5. LDO_0/1/2_IN also present, likewise VIN_RTC_*

3rd tech looking at this machine. LD on U9801, U9850 (GPU MUX related) - replaced LD on U7370 - replaced LD on U1950 - replaced So far nothing has resolve the primary issue where the machine will fire up to 20V, spike 800mA for a moment, then reduce to 600mA constant and run the fans from...

For the purpose of differential testing of a board here; does the A2289 / A2251 trackpad have electrical compatibility to any other models like the A1989 or A2159 ? Regards, Paul.

Hello all, Wanting a clean ME region 820-2915 BIOS that I can use for my own BIOS generation ( doing the usual ssn SN change, and then fixing the checksum using UEFITool ). If that's not available, then SN I need this BIOS for is C2QKR3D1DV33 Regards, Paul L Daniels.

... and that was the penny-drop moment. After I pulled the BIOS off the dead board, checked its SN, lo behold, it's a W8012... 11 byte SN. Explains a lot of things. Thank you. This task is now complete.

That makes things all the more curious. I'm wondering if the bottom plate that was fitted is in fact the incorrect one for the chassis/machine that was supplied. Unfortunately the mainboard was dead (PCH) as such I was not able to boot to confirm the SN. Just realised now I can take the chip...

Right, this is where I'm runnning in to an issue. The supplied BIOS has room for 11 character SN, where's the SN I have for this machine is 12 characters; so where do I factor in the extra byte? I can expand the whole section of the file and removing two of the zero-bytes immediately following...

Thanks. I don't have the Medusa. I still do it the long way, removing the chip, reflashing and resoldering; which at least works for all the boards.

Have you tried checking Badcaps forum? They're a very good non-payment, English-centric site.

Ah, small world there. Hope the new releases of FlexBV are helping you adjust colours more to your liking, especially now with the colour adjustable parts ability. Did you get 32kHz on pin 12 of U1900 ? Is the corrosion seemingly from liquid ingress or more just that typical surface corrosion...

What's PPVRTC_G3H ? Do you also get PCH_CLK32K_RTCX1 (32kHz) ? Look around U6100 / U1900 for damage/corrosion Also check U8005 for corrosion

Hello all, definitely calling in a plz-bro on this. I've got an A1286 with an i7 2.66GHz mainboard that I have to replace for a client and I want to migrate the SN, unfortunately none of the clean-ME region BIOS images for the 820-2850 seemed to work for me ( usually 165, 3437 and similar ones...

Welcome back. The board is running again.

Are BIOS/EFI repairs done here still? Apologies if not, I know it was something that Duke offered at the time in the past.

Require a BIOS fix for an 820-00163 which exhibited no response/activity other than to show blinking folder when all devices (and USB) are removed. Testing with a donor board BIOS restored functionality. Original (corrupted?) and donor BIOS images included in the zip file located at...

Thank you ( also thank you to piernov who also dropped some useful information to me too ). I'll give that a run today and see how it goes.

Have a Macmini 2014 model (with the beloved T6 security torx), comes up with a 6-digit pin lock with Apple logo. This unit is from an e-waste recycling centre that I normally do a lot of work for, so I'm assuming valid ownership. I've cloned the 64MBit chip that's on the top side of the PCB...