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Mac Pro 2013 - Fan not working. Found that the interposer cable between the fan/wifi part and the i/o board was burnt. Traced back to the reverse of the i/o board (the connector in the picture is the i/o interposer connector) and can see a burnt component. I'm suspecting its a resistor but no...

Yes i know that its normally the U8900 causing problem but its not in this case. This board has been seriously fucked with (GPU replaced, badly) so want to see if i can run it on intel only. I'm just wondering if anyone has figured out how to bypass this in hardware (similar to the GMux bypass...

Minor liquid damage. Fan spins for a couple of seconds then repeats. PP5V_S3 jumps from 0.2 to something as fan goes on and off PP5V_S0 jumps from 0.6 to something as fan goes on and off. Cannot see anything on either of these lines that is suspicious. Diode mode PP5V_S3 0.430 Diode mode...

No liquid that can be seen. Case is in good condition and dosen't suggest a drop or physical incident. No backlight and no image on internal LCD. External monitor connected, machine boots with external as main screen. (showing Apple logo etc externally so not detecting internal) Tried new...

820-4924 Liquid Damage to U7100 area. Replaced U7100 and various around that area Works perfectly on AC adapter. Works fine on battery until it drops below about 80% when Kernel task takes over the CPU. Tried a new battery same problem. Passes all built in test on both AC and on battery...

820-3115 (2.5 i5) Not posting with original bios. Works with donor bios but slow. Original bios here: https://drive.google.com/open?id=1X-...t7Fsp9-uIfFr84 Would it please be possible for a clean version or link to a proper guide to clean it. Thank you.

Pre worked and cleaned board. (sorry) ppbus_Gg3h not shorted 0.45v diode mode. (U7330/20/10 not shorted) Liquid damage to U7100 area Replaced U7100 R7151 R7152 R8131 - ran wire for pp3v42 as pin 1 burnt U7100 resistance pins 23/24 u7100 22ohm pins 17/18 u7100 3.4ohm pin 2 15.8v pin3...

iMac 21" 2013 no power. no lights on MLB Tried known good PSU same result. Found that pp3v3_S5 has a dead short to ground. Seems to be on pin 1 of L7610 (0v diode mode) Pin 2 of L7610 is 0.125v Tried injecting some voltage got to 3amp @ 0.7volts Not done many iMac boards so am unsure as to...

820-3787 Been previously cleaned (boo!) had backlight issues which have been resolved. Fan is running full after about 10 seconds into boot. EFI ASD gives following errors: TM0P TP0P TW0P Ta0P Looked at U5870 as this seems to deal with all of these. Checked continuity to/from this chip...

820-00165 very clean looking board. No obvious liquid damage anywhere. pp3v42 0.2v ppbus_g3h 0.585v short to ground on pp3v42. removed L7095 - short is on system side (pin2) 0v diode mode 0ohm spent some time removing caps on pp3v42(to oneside then checking for short then putting back)...

Hi There, 820-2936 With ORIGINAL ROM chip quarter fan spin With DONOR ROM chip - boots fine. ORIGINAL ROM chip is N25q064a. As i don't use the TL866 very often so i found another TEST N25q064a (from a MBP 15" 2012) to play with first to make sure i could remember how to do it. The TEST...

820-2936 liquid damage to SMC area, SMC reset chip and clock chip area. Had no green light. Replaced SMC reset chip, reflowed SMC. Now get green light and PPBUS is 12.56v Now get quarter fan spin Replaced U2800 replaced Y2805 replaced caps etc in that area no change. Checked CPU Vcore. It...

Clean machine, no signs of liquid, boots up does not feel "jerky" when booting From the moment the power button is pressed the fan runs 100%. Tried Known good Battery, SSD, DC in, Dc in flex, Track pad, track pad flex and two different fans. EFI Asd tells me : "Motor is running slower than it...

820-3462 No green light. Light liquid damage. to pp3v42 area R6920 + R6905 burnt. Replaced these. PP18V5_DCIN_CONN 2.3v PPVIN_G3H_P3V42G3H 1.1v pp3v42 = 0.008v Replaced: C6992 C6991 C69901 R6995 R6996 C6994 q6910 c6995 c6999 u6990 u6900 PPVIN_G3H_P3V42G3H diode mode to ground0.35v...

Had a 820-4924 with bad liquid damage, Replaced a lot of things (whole U7100 area etc) Now all working except that the speakers are not seen in software. Machine chimes on start but only gives me Digital Audio out as an option in software (if insert headphones audio plays through them). No...

820-3435 pp3v42 present green light damage to R6120/6121 ran wire and replaced. ppbus 8.58v PPBUS_S5_HS_COMPUTING_ISNS 8.58 PPBUS_S5_HS_OTHER_ISNS 8.58 PPVRTC_G3H 3.3v PP5V_S5 5.01v PP3V3_S5 3.28v PP3V3_SUS 3.3v SMC_PM_G2_EN 3.4v SMC_LID 3.4v PP3V3_S4 jumping high then low. PP5V_S4RS3...

820-3330 LVDS area damage (from end user forcing on a 2011 panel) Blown BKL fuse. Green light, no fan spin. Charges battery, no power on with battery. CPU cold, PPBUS_G3H 12.56 PPVIN_S5_HS_COMPUTING_ISNS 12.56 PPVIN_S5_HS_GPU_ISNS 12.56v PPVIN_S5_HS_OTHER_ISNS 12.56v PP3V42_G3H 3.416...

Not liquid damaged (or very well cleaned) Green light and pp3v42 present. PPBUS_G3H - 1.7v with 0v volts to ground in diode mode Removed fuses F7040 / 7041 short is on PIN2 Pin 1 with fuses removed is 12.56v so generation is working Injected some voltage into pin2 got to 4.5v @ 8amp CPU...

This board had liquid damage and was repaired by me. I replaced LVDS socket and ran a couple of wires for damaged traces round the LVDS area. Machine works perfectly fine until it goes to sleep - either by time or by closing the screen. When waking from sleep i get backlight (apple logo...

820-3208 Had powered USB device inserted, now does not turn on. No liquid damage, no burnt components that i can see green light present, goes to orange. CPU stays cold, PCH U1800 gets warm. PPBUS_G3H = 8.34v PPBUS_S5_HS_COMPUTING_ISNS = 8.38v PPBUS_S5_HS_OTHER_ISNS 8.36v PPVRTC_G3H = 3.3v...