Search results

looking a little close, found corrosion at U9000 and surround components, along with U9080 and surrounding components. Somehow i missed these. Let me clean these up and hopefully this is what's causing my issue.

All SLPS2R and AWAKE voltages are present. I did try DFU mode revive and kept getting errors. When i first plugged in to my system, configurator 2 show that the MacBook pro was in recovery mode.

YEah, correction on that, the board does power up, just doesn't boot. PLT_RST_L - 3.3 SMC_LID_LEFT - 3.3 SMC_LID_RIGHT - O.1 LID_OPEN - 3.3 The CPUVR readings were from the board out of the unit. Flashed good bios with same result

PPBUS_G3H - 13.1 PP3V3_S5 - 3.3 CPUVR_SW1 - 0.95 CPUVR_SW2 - 0.95

Have this board that's not powering up. I'm using the 820-01041 schematic also as it appears to be the same as this board, 820-01326. Anyway, i get PP20V and current pull when battery is connected, indicating battery charge and no current with battery removed. I'm still a bit rusty with these...

Have a 820-00840 that isn't booting up. Owner said it was running fine the previous day and all of sudden won't power up. I've checked the board for corrosion or sign of spill, none. The board does get warm with PP20 present and about 70mA of current draw. I've flashed new ME as well with the...

Replaced U4830. Now fixed. Thanks for the support as always.

So, measured around and found IOXP2_INT_L. Diode mode reading was 1.38. On another similar board, though dead, had measurement of 0.68. Confirmed on 2 of my donor boards with the same 0.68 reading. I check the surrounding pins on J4801. Unless you think of something else, i'm going to order and...

SMC reset works. Regarding I2C_IOXP_SCL/SDA, Would you have a correct boardview for this board. The one i have isn't quiet correct and i've not been able to find the true board view. Or any suggestion on what probe points to use

Have a board that doesnt recognize any keyboard, except external. Trackpad confirmed good. Tested on multiple frames with same results. Cap lock light doesn't come on either. Voltage on cap lock pin "WS_KBD15_CAP" is 2.4v. Since all keys aren't responding, is there a common items between both...

Yeah figured that was going to be an issue. If I replace the ssd modules with another from identical board, will I run into issues with the T2 firmware bricking the board?

Got a board that wasn't powering up, missing 20v supply. Isolated to blown U9080. Replaced the blown chip and now have 20v power, but board still won't power up. Isolated to U8900 with a short, about 1.5ohms on PP2V5_NAND_SSD0 line. After removing U8900, resistance on that line is now 20ohms. Is...

Sorry for the late response on this. J9600 does have good contact

Have this one that was sent in with the question mark folder. I was able to go into Recovery window and confirmed that the ssd wasn't being seen, only the portion that carriers the OS re-install file. While trying an external storage, it also won't load the OS, but gives the error about needing...

Customer changed mind on repair since I wasn't able to locate a pulse transformer for the ethernet port locally. They weren't willing to wait on the parts to be ordered. Anyway, thanks for the assist

Got this iMac 27 that owner had attempted some work on and now won't power on. What i noticed was after it's power on the first time and then shutdown, it won't power on until the power plug is removed for a few seconds. Looking at the board LED's, when i first power it up, all the LED's on...

Customer couldn't wait any long was content with keyboard lights staying on. Thanks for the assist though

So after reinstalling the OS, this resolved the backlight staying on once the laptop is powered down. But i still don't have control of the keyboard backlight once powered up. it remains at full brightness. Took the measurement as requested and here's the values pins 1 goes from 1.15 to 1.3...

it doesn’t respond to bright light or dark room settings for the keyboard. The display however does respond to changes in light.

PLT_RESET_L preset @ 3.3. All gpu voltages are also present Put in a know good bios with the same result.