nyuuzyou/wikis huggingface dataset:
A1398 Common issues

==Mid 2012-Early 2013 (820-3332)==
The MacBook Pro may appear to turn off. The fans will still spin and caps lock will still work. The internal and external displays will cut off at the same time. The external display will cut off with the internal disconnected. You may be able to reproduce the issues by tapping on the logic board The cause is that the GPU is losing power due to flexing and brittle solder around U8900 (GPU Buck converter). Solder U8900 with an iron and leaded solder. Triple check all joints under a scope.
==Late 2013-Mid 2014 (820-3662, 820-3787)==
Screen off with computer on, or crashing: Sounds like the FDMF6808 chips are failing and causing black screening. You can try fixing this by replacing all 3 of them with NEW FDMF6708 or FDMF3030 chips from a reputable source like Mouser or Digikey. Possible software fix linked here
If you have dedicated graphics on your board then the above fix has a pretty low success rate.
If you have internal graphics, aka no separate graphics chip on your board then the above fix success rate is very good.
(source)
Additional notes : Symptoms are very unlikely to be a screen or screen cable issue. If you’re not getting image when this happens, then it’s not related to backlight either. Very very small chance it’s a GPU/CPU issue unless the fail is major. The FDMF chips issue arises from the board flexing. The chips tend to fail and cause the device to not wake from sleep/randomly shut down due to CPU VCore dropping out. Machine will stay on but basically never wake from sleep at times. If you’ve never messed with microsoldering before, I would recommend sending it to someone who has experience fixing this issue. If you have done board repair, then this repair is a little tedious so you want to make sure you get GOOD chips as the ones claimed to be new in China often end up being sanded down garbage to look new.
==2015 dedicated graphics (820-00163, 820-00426)==
These boards absolutely require a good charged battery to fully boot into macOS. As usual it's not uncommon to get 2 or 3 bad batteries in a row so make sure you are using a known good one, one that for sure works with others 15" 2015 DG boards.
With a bad battery or no battery, the machine will reboot during or at the end of macOS boot. In this case disconnecting the touchpad often allows it to boot fully since it causes throttling and lowers the overall power consumption of the machine.
==Additional insight from Tim @TCRS Circuit regarding dedicated GPU L2013-2015 and also U8900==
The question was : Do you still have good success rate with mosfets on dedicated GPUs A1398?
<youtube>F11FKJf422A</youtube>
Category:Mac 
Category:MacBook 
Category:MacBook Pro
A1418/A1419 Power Supply

== A1418 ==
== A1419 ==
All graphs with display off and iMac on. Please note that the 12V rail can appear stable when these power supplies are failing. Pulsing on pin 1 and pin 3 being high seem to be signs of the power supply failing.
12V
Pin 1: PWR_BTN_R (Pulled up to PP3V42_G3H)
Pin 2: Ground
Pin 3: SMC_ACDC_ID_R (Pulled up to PP3V3_S0)
Pin 4: TSNS_ACDC_N
Pin 5: TSNS_ACDC_N
Pin 6: Ground
Pin 7: BURSTMODE_EN_R_L (Pulled up to PP3V3_S4)
Category:Mac Category:iMac
A1502 Common Issues

== Flickering Display ==
Liquid will often corrode the PP3V42_G3H probe point near the hall sensor on the board. It will cause the screen to fade in and out as it is tripping the SMC_LID circuit. Since this point always has power it will corrode away. Instead of removing the sensor board and running a jumper wire underneath, you can run a wire from the trace to the capacitor on the sensor board as shown:
== No Keyboard and/or Trackpad not working. ==
This can include the power button not turning on the MacBook Pro. The Trackpad cable often goes bad due to the bend in the cable. It can have no outward appearance of wear. Replace the cable and it will often solve the keyboard and/or trackpad not working.
A1706/A1708 TConn Backlight Pinout (FlexGate)

=====NOTE *=====
 - Here is a very useful video by Phuket My Mac (Julien) on this FlexGate repair https://www.youtube.com/watch?v=JLrKuK7IK3I 
*- This type of repair might be used as a temporary solution or as a cheap alternative to display replacement with restricted warranty. If done unproperly it might cause short circuit on the backlight line which will damage the logicboard. For obvious reasons we as repair community recommend to educate customer about replacement program and to help them with free-of-charge replacement. It is known that many devices which are not listed in Apple Replacement Programm are still being serviced which clearly proves that highly likely there is "under the table" replacement programm for all flexgate-affected devices and each particular case is regulated by Apple Genius/his manager. Reliabilty of any sort of flexgate repair is higly questionable for two reasons: 1. even if done properly, soldered cable will be moved every day and it will break eventually, or insulation will be worn off and backlight power might be shorted to ground or to feedback lines causing more damage than just displa replacement. No repair store can really perform 1000-2000 automated bends to check if this method lasts long enough, reliable and safe to perform. 2. There are 4 cables between LCD assembly and T-Con. All of them are prone to fail. You cant repair every single one of them. If backlight fails - Camera cable is next one to fail. You fix the camera cable and the next candidate is data cable, both of them, in random manner (see 2018-2019 macbook flexgate "pink lines" issue)
 - Here is a more permenent solution offered by La Clinica de la Manzana (Joseph) on this FlexGate repair <youtube>https://youtu.be/a2QSHlcMfxw</youtube>
===Pink bars issue===
===Testing and repair equipment===
Tcon Test cable
Backlight + Camera cable repair kit
A1708 SSD

#REDIRECT Apple SSD connectors and adapters list#Gen.5%20OEM%20CompatibilityFirst you should check if the machine is affected by https://support.apple.com/13-inch-macbook-pro-solid-state-drive-service
About compatibility between 2016/2017:
https://beetstech.com/blog/apple-proprietary-ssd-ultimate-guide-to-specs-and-upgrades
 After extensive testing with every Gen. 5A drive we could get our hands on, it appears that 128GB SSDs with part numbers beginning with 656-0074 and 256GB SSDs with part numbers beginning with 656-0076 are only compatible with the model A1708 laptops from the Mid 2017 release.
Note that the SSD_BOOT_L/SSD_PWR_EN_L circuit is different between 820-00875 (2016) and 820-00840 (2017). Only the schematics for 820-00875 is available, in this one U8640/R8645 are populated while R8641/R8642 are not. On the 820-00840 it's the opposite.
Category:Mac 
Category:MacBook 
Category:MacBook Pro
ACPI power states

ACPI state	Intel state	Apple state	Description 	Apple enable signal 	Power well	Since platform
G3 	G3 	G3C 	Mechanical off 	Always on with coin cell battery, main battery or AC adapter	*RTC 	
G3 	G3 	G3H 	Mechanical off 	Always on with main battery or AC adapter 	*_G3H 	
S5 	S5 	S5 	Soft off 	SMC_PM_G2_EN, not asserted when off on battery only 	*_S5 	
 	DeepSx 	SUS 	Low power sleep state 	PM_SLP_SUS_L 	*_SUS 	6-series chipset (Sandy Bridge)
S4 	S4 	S4 	Hibernation (Suspend to disk)	PM_SLP_S5_L 	*_S4 	
S3 	S3 	S3 	Standby (Suspend to RAM) 	PM_SLP_S4_L 	*_S3 	
S0 	S0 	S0 	On 	PM_SLP_S3_L 	*_S0 	
 	S0i3 	S0I3 	Processing instructions 	PM_SLP_S0_L 	CPU VCore 	100-series chipset (Skylake)
https://en.wikipedia.org/wiki/Advanced_Configuration_and_Power_Interface#Power_states
Category:Mac
ALL SYS PWRGD

In Apple schematics for at least 2011 to 2015 boards, the "ISL Version" of "S0 Rail PGOOD Circuitry" is usually no-stuff (everything with BOM option S0PGOOD_ISL should be absent from a production board).
Instead, the "BJT Version" is used, as well as the bunch of resistors to the right of "ISL Version" (without BOM option S0PGOOD_ISL).
For example on 820-3332 (pictured here), ALL_SYS_PWRGD is pulled up by PP3V3_S0_PWRCTL (which is PP3V3_S0), and Q7950 can pull down ALL_SYS_PWRGD if one of its input signal is missing. Any of the other PGOOD signal going through R7963 to R7968 can also pull it down.
As for Q7950, all of the bases of the BJT (left part of Q7950) must be 0.6V-0.7V in order to pull low the gate of the MOSFET (right part of Q7950) so that it doesn't pull ALL_SYS_PWRGD to ground.
Category:Mac
Amtech

Our favourite flux. 
But there are so many knock offs. How to find out if you have a real one?
#The real flux costs around 25USD / £20 or more.
#The real flux does not have Chinses writing and hologram on it
#If you shine UV light on the rea one, it will react to it, and shine bright.
#The real Amtech flux flows more creamy, where as the fake one is more chunky. 
Other article to note:
https://www.eevblog.com/forum/chat/is-this-amtech-flux-i-bought-genuine/
https://www.microsoldering.com/amtech-nc-559-flux-fake-versus-real/
Angle sensor circuitry

This page describes layers and connections to repair a Lid Angle Sensor on A2442 (14" MBP ) & A2681 (M2 MBA)
Special Thanks to https://iboffrcc.com/ for the pictures !
== This is the A2442 (14" MBP) repair picture for the Lid Angle sensor ==
== This is the A2681 (M2 MacBook Air) repair picture for the Lid Angle sensor ==
== Examples of repairs ==
Apple MacBook Flat Rate Repair Pricing

These are guidelines and may not be 100% accurate any longer, but a general idea for expectations and comparison with SC vs. Apple in order to discuss the best option with the customer. 
Use this manual as a guide while consulting customers on repair options. 
Example 1:  Edward Scissorhands brings in his 2017 15" MacBook Pro with a broken display.  Edward explains that he dropped his MacBook Pro and would like pricing on replacing the display.  You price replacement displays and find that an approximate repair quote for this is around $799 if repaired by Shiny Computers.  You check Apple tier pricing and find it is slightly cheaper through Apple.  You can now advise Edward that it would be best for him to go directly to Apple for this repair as not only will it be slightly cheaper, he is going straight through the manufacturer.  
Example 2:  Aveline de Grandpre brings in her 2015 13" MacBook Pro Retina.  She is experiencing start up issues and after further diagnosis you determine that there is a bad trackpad cable and it does not appear to be caused by Aveline in any way.  By looking at the tier pricing, you see that Aveline will be charged $280 through Apple (Flat Rate 1) for the repair.  However, we can repair this issue for only $99.  You can now confidently advise Aveline that it is more beneficial for her to have Shiny Computers complete the repair.  
Apple Flat Rate & Accidental Damage Repair Pricing (Depot)
Flat Rate 1	Flat Rate 2	Tier 1	Tier 2	Tier 3	Tier 4
*Power adapter port
*Right/Left I/O ports
*Flex cables
*Speakers
*Fans
*Microphone
*Wireless cards
*Trackpad
*Removable RAM
*HDD
*Optical drive
*Bottom case (with or without embedded battery)
*Top Case (with or without embedded battery)
*Top case/keyboard/bottom case with embedded battery
*Touch ID	
*SSD
*MLB
*LCD
(Also includes combination of if there is also Flat Rate 1 repair needed in addition)	
*RIO/LIO/MPM
*Enclosure
*Bottom case
*Flex cables
*Speaker
*Fan
*Microphone
*Wireless Card
*Removable RAM
*HDD
*Optical drive
*Touch ID
(Not caused by liquid)	Only 1 of the following:
*LCD
*Top case/keyboard
(Not caused by liquid)	More than 1 of the following:
*LCD
*Top case/keyboard
(Not caused by liquid)	Any of the below in addition to any lower tier parts:
*Logic board
*SSD 128GB or higher
(Typically any liquid indicators that are red will fall under this tier regardless of the part)
Flat Rate = Functional failure not customer-induced but out of warranty. 
Tier 1 - 4 = Customer-induced damages 
Pricing per model
 	Flat Rate 1	Flate Rate 2	Tier 1	Tier 2	Tier 3	Tier 4
MBA - 2017 or earlier
13” MBP Retina	$280 	$475 	$280 	$475 	$635 	$755
12” Macbook Retina	$280 	$575 	$280 	$475 	$735 	$975
13” Macbook
13” MBP with OD	$280 	$475 	$280 	$360 	$520 	$755
13” MBP with TB 	$280 	$475 	$310 	$475 	$825 	$1240
15” MBP with OD
17” MBP	$310 	$575 	$310 	$590 	$760 	$1240
15” MBP Retina 	$310 	$575 	$310 	$680 	$1030 	$1475
15/16” MBP with TB	$310 	$795 	$310 	$680 	$1030 	$1475
Apple Mail Manual Transfer

Library:
.../Accounts (folder) (DO NOT FORGET THIS ONE)
for Mail
.../Mail (folder)
.../Mail Downloads (folder)
.../Containers/com.apple.mail (folder)
.../Preferences/com.apple.accounts.plist (file)
.../Preferences/com.apple.accountsd.plist (file)
.../Preferences/com.apple.mail-shared.plist (file)
.../Preferences/com.apple.MailMigratorService.plist (file)
.../SyncedPreferences/com.apple.mail-com.apple.mail.vipsenders.plist (file)
.../SyncedPreferences/com.apple.mail.plist (file)
for Keychain
.../Keychains (folder)
Apple Manufacturing Plant Codes

This is a broad overview i was able to collect of the plant codes and corresponding locations/factories Apple uses.
If you are able to find out more information about a specific code or have completely new ones feel free to commit a change to this list
Code	Factory
E 	Singapore
F 	Fremont, California, USA/Fountain, Colorado,USA (varying sources)
FC 	Fountain, Colorado, USA
XA 	Elk Grove/Sacramento, California, USA
XB 	USA
QP 	USA
G8 	USA
RN 	Mexico
CK 	Cork, Ireland
VM 	Foxconn - Pardubice, Czech Republic
SG 	Singapore
MB 	Malaysia
PT 	Korea
CY 	Korea
EE 	Taiwan
QT 	Taiwan
UV 	Taiwan
FK 	Foxconn – Zhengzhou, China
F1 	Foxconn – Zhengzhou, China
F2 	Foxconn – Zhengzhou, China
W8 	Shanghai, China
DL 	Foxconn - China
DM 	Foxconn - China
DN 	Foxconn - Chengdu, China
YM 	Hon Hai/Foxconn - China
7J 	Hon Hai/Foxconn - China
1C 	China
4H 	China
WQ 	China
WQ 	China
F7 	China
C0 	Tech Com, Quanta Computer Subsidiary - China
C3 	Foxconn - Shenzhen, China
C7 	Pegatron - Shanghai, China/Foxconn, Changhai, China (varying sources)
RM 	Refurbished/remanufactured
F5K 	Flextronics - USA
CK2 	Cork, Ireland
C02 	Tech Com, Quanta Computer Subsidiary - China
C07 	Tech Com, Quanta Computer Subsidiary - China
YM0 	Hon Hai/Foxconn - China
C17 	China
C1M 	China
C2V 	China
C2Q 	China
Apple Mobile Device Public Repair Pricing

These are the public repair prices available through Apple Support. 
In most cases, we are able to beat Apple's repair pricing. However, if Apple can repair the part for lower than we can offer, or in some cases we cannot at all, you will need to refer to Apple. 
Pricing is as of 12/23/20
Device 	Front Glass	Back Glass/Other Repairs	Battery
iPhone 	 	 	
12 Pro Max 	329 	599 	69
12 Pro 	279 	549 	69
12 	279 	449 	69
12 Mini 	229 	399 	69
iPhone SE 2020 	129 	269 	49
11 Pro Max 	329 	599 	69
11 Pro 	279 	549 	69
11 	199 	399 	69
XS Max 	329 	599 	69
XS 	279 	549 	69
XR 	199 	399 	69
X 	279 	549 	69
8 Plus 	169 	399 	49
8 	149 	349 	49
7 Plus 	169 	349 	49
7 	149 	319 	49
6s Plus 	169 	329 	49
6s 	149 	299 	49
6 Plus 	149 	329 	49
6 	129 	299 	49
SE 	129 	269 	49
5/5c/5s 	129 	269 	79
4s 	n/a 	149 	79
4 	n/a 	199 	
 	 	 	
Watch 	 	 	
Series 5 - GPS Alum/Nike 	299 	n/a 	79
Series 5 - Cell Alum/Nike 	349 	n/a 	79
Series 5 - Cell Stainless/Hermes 	399 	n/a 	79
Series 5 - Edition Titanium 	499 	n/a 	79
Series 5 - Edition Cermamic 	800 	n/a 	79
Series 4 - GPS Alum 	299 	n/a 	79
Series 4 - Cell Alum 	349 	n/a 	79
Series 4 - Stainless, Hermes 	399 	n/a 	79
Series 3 - GPS Alum 	159 	n/a 	79
Series 3 - Cell Alum 	229 	n/a 	79
Series 3 - Stainless Steel/Hermes 	329 	n/a 	79
Series 3 - Ceramic 	800 	n/a 	79
Series 2 - Alum 	229 	n/a 	79
Series 2 - Stainless, Hermes 	249 	n/a 	79
Series 2 - White Ceramic 	800 	n/a 	79
Series 1 - 2nd Gen Alum 	199 	n/a 	79
Sport - 1st Gen 	199 	n/a 	79
1st Gen 	249 	n/a 	79
Hermes - 1st Gen 	249 	n/a 	79
Edition - 1st Gen 	2800 	n/a 	79
 	 	 	
iPad 	 	 	
Pro - 12.9" 3rd Gen 	649 	649 	99
Pro - 11" 	499 	499 	99
Pro - 12.9" 1/2 Gen 	599 	599 	99
Pro - 10.5" 	449 	449 	99
Pro - 9.7" 	379 	379 	99
5th/6th/7th Gen 	249 	249 	99
4th/3rd Gen 	299 	299 	99
1st/2nd Gen 	249 	249 	99
Air 1 	249 	249 	99
Air 2 	299 	299 	99
Air 3 	379 	379 	99
Mini 3/4/5 	299 	299 	99
Mini 1/2 	199 	199 	99
 	 	 	
Pencil 1st/2nd Gen 	n/a 	n/a 	29
Airpods - 1st Gen 	 	Lost - $69/each 	$49/each
 	 	 	
iPod - if available, select models/gens	 	 	
Shuffle 	n/a 	39 	39
nano 	n/a 	99 	59
Classic - L2009, 160GB 	n/a 	299 	149
Touch 	129 	129 	79
Apple Quality Programs

==MacBook==
===MacBook Pro: Distorted video or no video issues (NVIDIA GeForce 8600M GT)===
https://support.apple.com/en-us/HT203254
Solution: replace defective G84-602-A2 (dark underfill) GPU with fixed revision G84-603-A2 (white underfill)
===MacBook Pro (15-inch, Mid 2010): Intermittent black screen or loss of video===
http://web.archive.org/web/20141121113458/http://support.apple.com/en-us/HT203554
Solution: replace C9560 with aluminum polymer or MLCC capacitor
===MacBook Pro Repair Extension Program for Video Issues 15" 2011 A1286===
https://web.archive.org/web/20150220164447/https://www.apple.com/support/macbookpro-videoissues/
solution 1: demux to disable the GPU using dosdude method Link or use CMIzapper Tiresias "the GPUkiller" solution Link.
solution 2: replace with 820-3330 logic board. 
===MacBook Pro Repair Extension Program for Video Issues 15" A1398 Mid 2012 - Early 2013===
https://web.archive.org/web/20150220164447/https://www.apple.com/support/macbookpro-videoissues/
solution: Resolder U8900 with leaded solder. Triple check all joints under a microscope.
===13-inch MacBook Pro Display Backlight Service Program===
https://www.apple.com/support/13-inch-macbook-pro-display-backlight-service/
solution: replace the entire screen assembly or replace/repair backlight flex cable.
==iPhone==
===iPhone 6 & 6 plus Touch Disease===
https://www.apple.com/support/iphone6plus-multitouch/
solution: remove the black touch chip (Meson) using heat, run a micro jumper (M1) to the damaged pad and put a new chip on. The problem goes away once this has been done.
===iPhone 6s and iPhone 6s Plus Service Program for No Power Issues===
https://support.apple.com/iphone-6s-6s-plus-no-power-issues-program
solution: replace tristar.
===iPhone 8 Logic Board Replacement Program===
https://support.apple.com/iphone-8-logic-board-replacement-program
Problem: cpu disconnect on logic board marked H3K5. solution: reball cpu and it will work again.
==iPad==
===iPad Air (3rd generation) Service Program for Blank Screen Issue===
https://support.apple.com/ipad-air-3rd-gen-program-for-blank-screen-issue
solution: replace screen assembly. not logic board problem.
Apple SSD connectors and adapters list

==Replaceable SSDs==
Gen.1 6I12 Pins 	Gen.2 7I17 Pins 	Gen.3&4 12I16 Pins	34 Pins
 	 	 	
SATA III 6 Gb/s 	SATA III 6 Gb/s 	AHCI, PCI x2&x4 	PCIe x4
MacBook Air 2010L/2011M 11"&13" (A1369,A1370)	MacBook Air 2012 11" & 13" (A1465, A1466)
MacBook Pro 2012L 13" & 15" (A1425, A1398)
iMac 2012L 2013E 21" & 27" (A1418, A1419)	MacBook Air 2013-2017 11", 13"(A1465, A1466)
MacBook Pro 2013L-2015E 13", 15"(A1502, A1398)
iMac 21" & 27" 2014-2017(A1418, A1419) (Fusion)
Please note: no connector on HDD version of iMac	MacBook Pro 2016-2017 2TBT
Data Recovery kit (SATA/USB Adapter)
M.2 NGFF Adapter	Data Recovery kit (SATA/USB Adapter)
M.2 NGFF Adapter iMac & Macbook Pro
mSATA Adapter A1425-Only 
M.2 NGFF Adapter Air-Only!	Data Recovery kit (USB Adapter)
Cheaper Desktop PCIE Card 
M.2 NVME Adapter
WARNING: 
for iMac please put capton tape on back side of m.2 connector	Known working adapter: NFHK
M.2 NVME 2240 Adapter
Any brand M.2 SATA 2232..2280 SSD B-Key 	A1425 fits only m.2 2260 SSD or mSATA	m.2 NVME 2280
2013/2014 devices need Bios update for nvme support
(simply install High Sierra on original drive) once. 
Samsung Firmware update might be necessary
Fix kernel panic on wake issue:
sudo pmset -a hibernatemode 0 standby 0 autopoweroff 0
Kernel panic on wake should be fixed with the firmware update of
Big Sur	Known working SSD: Sabrent Rocket 2240
2240 SSDs are difficult to obtain but some use 2280 which work very well but protrude from the adapter and are taped to the side
Gen.5 OEM Compatibility:
Macbook Pro 2016 (820-00875):
656-0041, 656-0041A, 656-0042, 656-0042A, 656-0043, 656-0043A, 656-0044, 656-0044A,656-0045, 656-0045A, 656-0046A, 656-0046B, 656-0066A, 656-0069A, 656-0070A 
All drives from 2016 model are compatible with 2017 model. 
Macbook Pro 2017-Only (820-00840): 
656-0067A, 656-0074A, 656-0074B, 656-0074C, 656-0074D, 656-0074E, 656-0076B
MacBook Pro 2017 model SSDs that are compatible with 2016:
656-0072A
Piernov: Note that the SSD_BOOT_L/SSD_PWR_EN_L circuit is different between 820-00875 (2016) and 820-00840 (2017). Only the schematics for 820-00875 is available, in this one U8640/R8645 are populated while R8641/R8642 are not. On the 820-00840 it's the opposite.
long article with more detailed information
==Soldered SSDs==
===T2 Macs===
T2 use Monolith SSD chips, combined into sort of RAID volume. Known method of replacement - use same board as a donor and keep IC position on board or preprogram NAND with JC P13 toolkit.
Apple Self-Service

Apple Self-Service information
USA: https://selfservicerepair.com
EU: https://selfservicerepair.eu/
== Repair Manual IDs ==
These are used to verify before you can place some parts in the cart on the website
====== iPhones ======
12 = RBQEVH
12M = 
12P = FWRUJK
12PM = TAGYWX
13 = WLBXAK
13M = PMCEGT
13P = RENLTC
13PM = EGKCZN
SE22 = GPCNKY
14 = LBWDCA
14+ = PHYGVK
14P = CBLXRW
14PM = XGTPKL
====== Macbooks: ======
Macbook Pro 13" M2 2022
QMXHLB
Macbook Air M2 2022
PTGVKD
MacBook Pro (13-inch, M1, 2020)
GBTWXF 
MacBook Air (M1, 2020)
JFDNFL
MacBook Pro (16-inch, 2021)
HFXVCU
MacBook Pro (14-inch, 2021)
BQEZWU
====== Desktops: ======
Mac mini (M1, 2020)
DBZKXG
Mac Studio (2022)
CWQBNX
iMac (24-inch, M1, 2021, Two ports)
LVHLQJ
iMac (24-inch, M1, 2021, Four ports)
SNCHJB
Studio Display
YDVPMR
BBOX

===Tools Needed:===
#Windows computer with internet access & a USB Port
#original or mfi lightning cable for best results
#JC BBOX C3
#JC Repair Operation Platform https://www.jcprogrammer.com/download-center
#3utools http://www.3u.com/
===Setup:===
#Download & run the JC Repair Operations Platform software from https://www.jcprogrammer.com/download-center
#To open the software register for an account & login
#skip the software update by clicking "next time"
#For best speed results, change the server to the best zone for your location. 5. Under install driver install CH341 driver (V1/B1/V1S/BBOX/Chip Module)
6. Go to the "nand repair" page by clicking the "nand repair" button in the top right
7. Connect the device & click the connect key until the BBOX shows "B-BOX: ONLINE"
===Getting Into Purple Mode:===
======1. Get your BBOX into "online mode"======
To get your BBOX into online mode you must
#2. While being plugged into your BBOX put the phone into DFU mode.
Basic iPhone LB Troubleshooting

# Visual Inspection 
#* Check for any missing sticker or shield then follow next steps
# Connect DCPS 
#* Draw max current? If draw max current you have VCC MAIN line shorted.
#* Draw some current? So you have probably a cap leaking some current. Check for any liquid damage
#* No current draw? Follow next steps
# Press Power Button for 1 second
#* Check for current next you pressed the power button. It should be something around 60-90mah 
#* High current? Check for any ugly cap around NAND or VDD_BOOST caps
# Tristar test
#* Check voltage on battery fpc without battery connect just with charger connected. This should jump around the charger voltage while it is looking for battery. If it goes below 3v like 0.6v flat you have a bad tristar.
Category:iPhone
Battery Lifespan

Batteries are considered consumed at
* 500 cycles for iPhones
* 1000 cycles for iPads
* 1000 cycles for Watches
* 300 cycles for A1181 and silver key MBP
* 500 cycles for removable unibody MacBooks
* 1000 for non removable battery MacBooks
If a battery is less than 80% capacity or greater than 80% of its consumed cycle count, it should normally be replaced when refurbishing. If a computer is under warranty only look at the capacity. Anything under 70% will likely perform badly.