A1708 2016, 2017 13” USB-C non-touchbar MacBook Pro

{|class="wikitable" ! style="text-align:left;"| Problem ! Solution Example: https://www.youtube.com/watch?v=jYa7KaPkZvg (19-20mA draw, 0.7Ohm short to ground on PPBUS_G3H caused by bad capacitor, 1Ohm resistor of current sensing circuit from U7000 (ISL9239) also blown) Example: https://www.youtube.com/watch?v=ssTL3pKda54 (Short to ground on PP3V3_S4, PPBUS_G3H 13.7V, bad capacitor, also damage to USB-C port, replaced CD3215 + other problems) Power cycling 10-30mA at 20V: Check for short to ground on PP5V_S4 Example: https://www.youtube.com/watch?v=PDKlWu1eDFA (Taking 20V, 0A. Ethanol used instead of thermal cam with 0.8V on PPBUS_G3H, resistance between PPBUS_G3H and CPU coil is 3.6Ohm) Example 2: https://www.youtube.com/watch?v=TZsvvUWUInE (Taking 20V, 20mA. Bad capacitor located via visual inspection)
 * Charger at 5v, 0.000 amp draw - no power draw.
 * PP3V3_G3H is most likely shorted to ground with a 0-1 ohm short, most likely due to bad capacitor. When PP3V3_G3H is directly shorted to ground, it won't produce heat - the PP3V3_G3H power IC is smart enough, usually, when it detects a straight 0 ohm short, to just turn off.
 * 20v, 0 amps, not turning on, no shorts.
 * Check for low resistance to ground on SMBUS_SMC_5_G3H_SDA or SMBUS_SMC_5_G3H_SCL. On older Macbooks, this would result in no battery recognition & a lower voltage on PPBUS_G3H - on USB-C models, it actually results in the machine not turning on at all. Can be caused by a tiny speck of conductive material in the battery connector.
 * Random crashing
 * No answer. This may be worth looking into. An extremely modest guy who wishes to remain anonymous along with Jake Hall and Matt Bone on the FB Logic board group have had success by inspecting and/ or replacing U7410 U7420 and U7430 and U7220 / U7370. Full post here (members only sorry, but join :) https://tinyurl.com/52t6vp2v ) Note board is 820-00840
 * No power, charger at 20V taking 20mA
 * Constant low power draw (10-20mA): Short to ground on power rail (can be PPBUS_G3H, PP3V3_S5, PP3V3_S4,...)
 * No answer. This may be worth looking into. An extremely modest guy who wishes to remain anonymous along with Jake Hall and Matt Bone on the FB Logic board group have had success by inspecting and/ or replacing U7410 U7420 and U7430 and U7220 / U7370. Full post here (members only sorry, but join :) https://tinyurl.com/52t6vp2v ) Note board is 820-00840
 * No power, charger at 20V taking 20mA
 * Constant low power draw (10-20mA): Short to ground on power rail (can be PPBUS_G3H, PP3V3_S5, PP3V3_S4,...)
 * Constant low power draw (10-20mA): Short to ground on power rail (can be PPBUS_G3H, PP3V3_S5, PP3V3_S4,...)
 * Constant low power draw (10-20mA): Short to ground on power rail (can be PPBUS_G3H, PP3V3_S5, PP3V3_S4,...)
 * Missing PP3V3_S5G missing due to missing PM_EN_P3V3_S5G, caused by bad (solder of) U7800 (PMIC), or corroded caps near it
 * No power, PPBUS_G3H shorted to ground.
 * Inject 1V (increase if no reaction), watch for hot spots with thermal cam. Usually it's a bad tantalum cap on the PPBUS_G3H rail.
 * Inject 1V (increase if no reaction), watch for hot spots with thermal cam. Usually it's a bad tantalum cap on the PPBUS_G3H rail.

Read the resistance from PPBUS_G3H to vCORE coils (coils around CPU/GPU) IF those measure UNDER 1Ohm (0.3-0.8) then you most likely have a direct 12V short to CPU/GPU. On this board this situation is always a no fix. Example: https://www.youtube.com/watch?v=gBAZCUShuU4 (board taking 35mA, 160Ohm short on PPVIN_G3H_P3V3G3H (input PP3V3_G3H creation circuit), fixed by replacing 3 capacitors and 1 diode) Example: https://www.youtube.com/watch?v=myhB6dcm5lE (device not turning on, charger taking 0 mA) Example: https://www.youtube.com/watch?v=nX7RwlTbHTQ (PP3V3_G3H 0.3V, resistance to ground measured as 380KOhm, active short caused by pi3usb32, found by using thermal camera)
 * No Power On, 19.5v 350mA constant power draw
 * PP5V_S5 missing - check and reflow or replace U7650 (TPS51980) with proper pads cleaning (especially on the PPBUS_G3H_P3V3S5 input of U7650). Possible problem: Apple refurbished board; solder over corrosion causing bad joint. Example of replacing a corroded TPS51980: https://www.youtube.com/watch?v=Y0JR1d7AizY
 * Dead CPU can also present like this.
 * Charger stuck at 5v instead of 20v
 * If 5v and 0.00 amp draw, most likely a 0-1 ohm short to ground on PP3V3_G3H
 * PP3V3_G3H missing due to a short circuit on the input to PP3V3_G3H creation circuit
 * Charger stuck at 5v instead of 20v
 * If 5v and 0.00 amp draw, most likely a 0-1 ohm short to ground on PP3V3_G3H
 * PP3V3_G3H missing due to a short circuit on the input to PP3V3_G3H creation circuit
 * PP3V3_G3H missing due to a short circuit on the input to PP3V3_G3H creation circuit
 * Corroded LDO cap for PP3V3_G3H around a CD3215
 * PP3V3_G3H missing due to PM_EN_P3V3_G3H missing due to bad ISL9239
 * Bad CD3215
 * Bad CD3215 ROM chip (U2890)
 * Bad solder of R3000 or R3001 resistor (not passing PP3V3_G3H through to one of the CD3215s)
 * Bad pi3usb32 (USB switch, not present on boardview, located next to usb ports)

See Charger stuck at 5v instead of 20v
 * Charger not turning on USB-C ampmeter at all.
 * Check PP20V_USBC for each port's resistance to ground.
 * Check PP20V_USBC for each port's resistance to ground.

USB-C charge port is shorted to ground, inside the charge port. Replace the charge port. It is not fun to solder. :(

Example: https://www.youtube.com/watch?v=ssTL3pKda54 (damage to USB-C port, also replaced CD3215 + other problems)
 * Battery not recognized
 * First, try a known good battery.
 * First, try a known good battery.

If it doesn't work, check the battery cable going to the board. Sometimes there is corrosion here, sometimes the customer tore the bar on the connector off the connector.

In some rare cases the SMC still is a factor in battery recognition on this board. Example: https://www.youtube.com/watch?v=vOQ0fb9M2m4 (0 V on backlight circuit, 59 Ohm short to ground caused by bad capacitor)
 * No backlight
 * Make sure the issue is no backlight, and not no image!
 * Verify that the screen assembly does not have the "flexgate" issue. Open laptop just a tiny bit and see if image/backlight shows. You can tell it is a flexgate issue when you can see a backlight when the machine is barely open, but you cannot see a backlight once the screen is fully open.
 * We do not fix flexgate issues.
 * Blown backlight fuse rarely if ever happens. This board has a current sensing circuit in place that keeps the backlight fuse from blowing if there is a short to ground on the backlight line.
 * Short to ground on backlight output due to bad capacitor on output.
 * Short to ground on backlight output due to bad capacitor on output.
 * Bad screen - if backlight voltage is 49-55v, bad screen. This is a common issue on this machine, due to the common flexgate issue. We do not fix flexgate issues.
 * Corrosion on current sense vias/traces for backlight to U8400, pin 9 & 10. Example video (skip past TPS51980 replacement): https://www.youtube.com/watch?v=Y0JR1d7AizY
 * No image
 * Check the LCD cable and the connector on both the screen side and the logic board side. The backlight power line is right next to the eDP data line for the image. Any minor corrosion here results in 30 volts or more going to the CPU data line. This we have no solution for since replacing the CPU isn't economically viable.
 * Check the LCD cable and the connector on both the screen side and the logic board side. The backlight power line is right next to the eDP data line for the image. Any minor corrosion here results in 30 volts or more going to the CPU data line. This we have no solution for since replacing the CPU isn't economically viable.

It can be a bad GPU inside the CPU, which we have no solution for. Rest in peace. No Solution.
 * "Braindead"
 * Laptop in S0 state but draws 100-200mA, backlight present but no image.
 * Laptop in S0 state but draws 100-200mA, backlight present but no image.

https://wiki2.rossmanngroup.com/index.php?title=File:820-00840_TPS51980_bad_joints_01.jpg https://wiki2.rossmanngroup.com/index.php?title=File:820-00840_TPS51980_bad_joints_02.jpg https://wiki2.rossmanngroup.com/index.php?title=File:820-00840_TPS51980_bad_joints_03.jpg https://wiki2.rossmanngroup.com/index.php?title=File:820-00840_TPS51980_bad_joints_04.jpg
 * USB devices not working when plugged in although charger works
 * This board has a USB redriver chip which is not present in the schematic and boardview. It is located right next to the USB connetor, on the opposite side from the CD3215s, next to U2800. Marking on the chip is PI3USB32224BXEAE. If it dies, it prevents USB communication with devices. Often times you can see a hole on the chip.
 * Potential no power in the future
 * Stress fractures on the TPS51980 joints, similar to U8900 issues on the 820-3332. . In time we may start seeing these come in dead for no reason and all it needed was reflow of TPS51980. On pin 25 there is already a hairline fracture, Pin 17, 18, 19, look like they are getting stressed. See here:
 * Potential no power in the future
 * Stress fractures on the TPS51980 joints, similar to U8900 issues on the 820-3332. . In time we may start seeing these come in dead for no reason and all it needed was reflow of TPS51980. On pin 25 there is already a hairline fracture, Pin 17, 18, 19, look like they are getting stressed. See here:
 * No wifi on nasty liquid damaged board.
 * Removed liquid damage, still no wifi. Solution: U3780, the wifi ROM died. Replaced, works!
 * No audio, sound card not showing up in system.
 * Chipped off R2041 on the backside of the cpu -> so no AUD_PWR_EN on L6361 and therefore only 0.3 V on L83_1V8 for the U6300 chip. Installed new resistor and sound card shows up.
 * No audio, sound card not showing up in system.
 * Chipped off R2041 on the backside of the cpu -> so no AUD_PWR_EN on L6361 and therefore only 0.3 V on L83_1V8 for the U6300 chip. Installed new resistor and sound card shows up.