Acer Fossil HD B1-760 Service Manual Download Page 8

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support of innovative products that enhance people's lives. Acer's product offerings include PCs, displays, projectors, servers,

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Acer employs 7,000 people and ranks No. 4 for total PCs globally (IDC 2014). Revenues for 2014 reached US$10.39 billion.

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Summary of Contents for Fossil HD B1-760

Page 1: ...1 Fossil HD B1 760 TABLET SERVICE GUIDE ...

Page 2: ...2 Diagnostic Utilities Introduction Flash Tool SOP Rewrite SN WIFI country code MAC BT address SOP pending Chapter 3 Service and Maintenance Introduction Disassembly and Assembly Guide L2 Troubleshooting Guide Chapter 4 Diagnostic Tool SOP Chapter 5 Serial Number Definition Introduction of Acer FG SN Introduction of Acer KC PN and Acer KC SN Chapter 6 FRU Field Replaceable Unit List Exploded Diagr...

Page 3: ... to change without notice Acer Incorporated makes no representatives or warranties either expressed or implied with respect to the contents hereof and specifically any warranties of merchantability or fitness for any particular purpose Any Acer Incorporated software described in this manual is sold or licensed as is Should the program prove defective following their purchase the buyer and not Acer...

Page 4: ...rvice guide In such cases contact your regional offices or the responsible personnel channel to provide you with further technical details When ordering FRU parts Check the most up to date information available on your regional web or channel If for whatever reason a part number change is made it may not be noted in this printed service guide For Acer authorized service providers Your Acer office ...

Page 5: ...oduct Features and Hardware Specifications Product Features and Hardware Specifications Features 1 2 Tablet Tour 3 Front View 4 Rear View 5 Top View 6 Bottom View 7 Left View 8 Right View 9 System Block Diagram 10 ...

Page 6: ...y Audio Built in mono speaker Built in microphone Storage 32 GB eMMC 16 GB eMMC 8 GB eMMC Card reader Supporting microSDTM Card Webcam Video conferencing Front webcam with 640 x 480 resolution Rear webcam with 1600 x 1200 resolution VGA audio video recording Wireless and networking WLAN 802 11b g n wireless LAN WPAN Bluetooth 4 0 Location services GPS Dimensions and weight Dimensions 107 W x 193 D...

Page 7: ...ronment 4 Memory speed may vary depending on the CPU chipset or memory fitted 5 A 64 bit operating system is required to enjoy the ultimate performance of 4 GB or higher memory 6 All brands and product names mentioned herein include trademarks of their respective companies and are used solely to describe or identify the products 7 1 GB is 1 billion bytes Actual formatted capacity is less and may v...

Page 8: ...ucts that enhance people s lives Acer s product offerings include PCs displays projectors servers tablets smartphones and wearables The company is also developing cloud solutions to bring together the Internet of Things Acer employs 7 000 people and ranks No 4 for total PCs globally IDC 2014 Revenues for 2014 reached US 10 39 billion Please visit www acer com for more information ...

Page 9: ...4 Tablet Tour Six View ...

Page 10: ...5 Front View Figure 1 1 Front View Item Description 1 Touch Screen TP_172 96 102_COF_G G _ZIF _black GT911 2 Front Camera Front Camera 5 5 2 95mm_30W_GC0312_FF 1 2 ...

Page 11: ...6 Rear View Figure 1 2 Rear View Item Description 1 Rear Camera Lens Black_cutting glass_bottom silkscreen 2 Rear Cover Module Rear Cover Module includes rear cover rear camera lens 1 2 ...

Page 12: ...7 Top View Figure 1 3 Top View Item Description 1 USB Port Used for charging 2 Headset Jack Connected to stereo headphones 2 1 ...

Page 13: ...8 Bottom View Figure 1 4 Bottom View ...

Page 14: ...9 Left View Figure 1 5 Left View Item Description 1 SD Card Slot Used for inserting SD card 1 ...

Page 15: ...10 Right View Figure 1 6 Right View Item Description 1 Power Key Power on or off the tablet 2 Volume Key Increases or decreases the tablet volume 1 2 ...

Page 16: ...11 System Block Diagram ...

Page 17: ...parts the open of flash tool and the download of a version 1 Open flash tool After decompress the flash tool archive the flash_tool exe shows in Figure1 is the tool that we need Figure 1 The location of flash_tool_acer_only exe Double check the flash_tool_acer_only exe Figure 2 will show up and after the ok button is clicked we will enter the download interface Figure 3 The download of Fossil HD s...

Page 18: ...13 Figure 2 The dialog shows up while double check the flash_tool_acer_only exe Figure 3 The download interface of flash tool ...

Page 19: ...ed to use the Download interface shown in Figure3 2 Download a Fossil HD s version The download of a Fossil HD s version involves two parts the download of secro sign img and the download of the whole version 1 The download of secro sign img It includes three steps shown in Figure 5 Figure 6 and Figure 7 Figure 5 Select a version ...

Page 20: ...n click the open button Figure 6 Find MT8127_Android_scatter txt inside of image folder Figure 7 Download secro sign img Step 3 make sure the download pattern is Download Only only secro sign img existed and checked Click the Download button to download the secro sign img and then connect the android device after power ...

Page 21: ...f the whole version It includes three steps shown in Figure 8 Figure9 and Figure 10 Step 1 and Step 2 click the Scatter loading button to find MT8127_Android_scatter txt and then click the open button to open the txt file the file exists in the same folder that contains the image folder Figure 8 Select a version Figure 9 Find MT8127_Android_scatter txt ...

Page 22: ...ndroid device after power failure with the computer through USB When the download ok dialog shows up it means the download of secro sign img has been completed Remember never use the Format pattern to download versions All download patterns are shown in Figure 11 as additional information Figure 4 Download patterns ...

Page 23: ...8 Figure 12 is the interface shown during the downloading process Figure 5 Downloading While the interface in Figure 13 shows up it means the download of version completed Figure 6 Download is completed ...

Page 24: ... USB driver uses Version Huaqin Android Driver All in One 1 1 8 USB driver installation Note Usually you should upgrade your target via USB communication mode so 32 bit system user should install Huaqin Android Driver All in One 32 bit V1 00 exe or above USB driver 64 bit system user should install Huaqin Android Driver All in One 64 bit V1 00 exe or above USB driver Huaqin Android Driver All in O...

Page 25: ...20 c Click Install button in the below picture to install dirver d Click Finish button in the below picture to finish dirver installtion ...

Page 26: ...ework 1 2 2 1 a First you should install the HQFramework on your computer Unzip the rar file below and you will get a exe file you should install it b Then you will get a dialog as blow choose the second item in drop down list to choose the Language of English c Click ok you will get the next step ...

Page 27: ...22 d Click next get Dialog below Click the install button and the software will install on your computer ...

Page 28: ...23 e Click finish and a dialog like Dialog 2 will appear that means you have installed the software successfully Dialog1 Dialog2 ...

Page 29: ...2 2 2 Install WriteStation Tool After install the software successfully and your desktop will appear a new icon like this 1 3 Others 1 3 1 Power cable 1 3 2 USB data cable 1 3 3 USB Hub when needed Please note that USB Hub should be powered II Connection ...

Page 30: ...ould also be installed if your handset is smart phone 2 2 HQFramework should be installed before WriteStation tool was installed Please keep default settings while installing 2 3 At last WriteStation tool should be installed and please keep default settings while installing IV Write 4 1 Double click the icon show as below picture to run WriteStation or 4 2 User interface of WriteStation ...

Page 31: ...26 4 3 Set parameters Password 20120405 ...

Page 32: ...orm information MTKFP indicates feature phone platform of MTK MTKSP indicates smart phone platform of MTK Qualcomm indicates Qualcomm platform Spread indicates Spread platform YEP indicates platform for Xi an institute ...

Page 33: ... here COM should be set if UART is chosen as communication mode while USBCOM if USB is chosen as communication mode Refresh The list of com ports will be refreshed when refresh is clicked PrintPort User should choose a print port if user want to use print function ...

Page 34: ... should begin with APDB and with no suffix PrintTMP Please choose a print template file The template file should as much like as supplied in help section IMEI File Please choose an excel file filled with IMEI BT File Please choose an excel file filled with BT WIFI File Please choose an excel file filled with WIFI CSN File Please choose an excel file filled with CSN ...

Page 35: ... name to Project list by Add button Project Include Project name every Project name have different Numbers can use Delete button to delete Project name that selected SWV Please enter your software version here to check software version matching and it can be omitted ...

Page 36: ...BTFlag BTFlag writing or checking will be enabled if this box is checked and disabled while unchecked Generally if BTFlag is checked tool will check the BTFlag FTFlag FTFlag writing or checking will be enabled if this box is checked and disabled while unchecked Generally if FTFlag is checked tool will check the FTFlag ANTFlag ANTFlag writing or checking will be enabled if this box is checked and d...

Page 37: ...32 4 9 SN Input Config SNCheck User can checked this box and check while write SN SNLength Check SN Length SNHeadString check SN Head String ...

Page 38: ...1 and upperRange1 indicate the lower range and upper range of IMEI1 respectively if the low range value less than or equal to the upper range value the tool will check IMEI1 lowerRange2 and upperRange2 lowerRange3 and upperRange3 lowerRange4 and upperRange4 the function of lowerRange1 and upperRange1 similar respectively NumAssign decide if IMEI will be assigned automatically by Number in tool int...

Page 39: ... the lower range and upper range of CSN respectively if the low range value less than or equal to the upper range value the tool will check CSN NumAssign decide if CSN will be assigned automatically by Number in tool interface HeadNum BeginNum EndNum CurrNum and Base indicate the head number the begin number end number current number and radixof CSN respectively ...

Page 40: ...Range indicate the lower range and upper range of BT respectively if the low range value less than or equal to the upper range value the tool will check BT NumAssign decide if BT will be assigned automatically by Number in tool interface BeginNum EndNum and CurrNum indicate the begin number end number current number and radixof BT respectively ...

Page 41: ...Range indicate the lower range and upper range of WIFI respectively if the low range value less than or equal to the upper range value the tool will check WIFI NumAssign decide if WIFI will be assigned automatically by Number in tool interface BeginNum EndNum and CurrNum indicate the begin number end number current number and radixof WIFI respectively ...

Page 42: ...37 4 14 Extend File Config ExtFile User can Select extend File by Select button ...

Page 43: ...38 V Write demonstration Note all operation should be done when phone is powered off A Input SN and IMEI numbers by manual others number like this 5 A 1 Config the tool ...

Page 44: ...39 ...

Page 45: ...40 ...

Page 46: ...o Operation panel and then input SN BT WIFI and IMEI correctly and then click Start or press Enter directly to start write number Tool will wait two minutes before phone connected otherwise tool will stop automatically ...

Page 47: ...42 ...

Page 48: ...43 User should power to the phone and then connect PC and phone via usb cable when count occur showing as the upper picture ...

Page 49: ...44 5 A 3 Operation complete B File assign IMEI number others like this ...

Page 50: ...45 5 B 1 Change to Operation panel and then click Start or press Enter directly to start write number Tool will wait two minutes before phone connected otherwise tool will stop automatically ...

Page 51: ...46 5 B 2 User should power to the phone and then connect PC and phone via USB cable when count occur showing as the upper picture Write IMEI successfully ...

Page 52: ...5 and IMEI4_14 SN CSN BT WIFI is SN CSN BT WIFI Appendix 2 The fabrication of IMEI file 1 The IMEI file is required for the EXCEL form 2 Excel file have only one form Please delete the redundant form 3 ID IMEI and STATUS only contains values corresponding column Cannot contain expressions Such as formula function etc 4 The value of the ID column is digital and can not be repeated ID IMEI1 IMEI2 IM...

Page 53: ...ng column Cannot contain expressions Such as formula function etc 4 The value of the ID column is digital and can not be repeated Appendix 5 The fabrication of CSN file 1 The CSN file is required for the EXCEL form 2 Excel file have only one form Please delete the redundant form 3 ID CSN and STATUS only contains values corresponding column Cannot contain expressions Such as formula function etc 4 ...

Page 54: ... same software version and the default language is English there is no need to considerate the country codes Only three countries need to use extension files to re write country code whose Wifi channel is 1 11 There is an extension file within the Re write Country Code SOP File as below If you want to flash back country which have 1 3 channel please select the extension file circled in red File Na...

Page 55: ...50 How to Check Wifi Channel Turn off Wifi In app list enter People application then input 3646633 on People search view See Figure 1 Figure 1 ...

Page 56: ...51 Select Connectivity tab choose item Wifi See Figure 2 Figure 2 ...

Page 57: ...52 Choose item Tx see Figure 3 Figure 3 ...

Page 58: ...53 Touch item channel just as Figure 4 it will display that the count of channel the current system supported see Figure 5 Figure 4 ...

Page 59: ...54 Figure 5 ...

Page 60: ...recautions Before you perform any service and or repair on the phone please follow the steps below first 1 Be sure that the phone is powered down 2 Disconnect the AC plug from the phone 3 Remove all rings watches and any other metal objects from your hands 4 Always wear a ground strap on your hand to protect the phone from static discharge II Appropriate Tools for Reference The illustrations below...

Page 61: ...56 2 Tweezers Use a pair of tweezers to remove insert cables 3 Disassembly Blade or Plastic Card SCREW Picture Acer PN Description 86 LB1N8 001 1 4 4 mm 4 pcs ...

Page 62: ...57 III Handset Disassembly Guide 1 Remove the battery cover 1 Insert the disassembly blade in the volume key location Volume Key Moving Direction ...

Page 63: ...card to separate the battery cover from the volume key at the left top corner along the direction of the shown red arrows 3 After removing the battery cover spare parts inside the tablet are shown as below Start from the volume key location ...

Page 64: ...59 4 Inner side view of battery cover are shown as below 2 Remove the cooling membrane Use tweezers to tear off the cooling membrane from battery cover ...

Page 65: ...he battery 1 Disconnect the battery connector with tweezes make sure don t damage the surrounding components 2 Use disassembly blade or plastic card to remove the battery along the direction of the red arrows shown ...

Page 66: ...61 4 Remove the main board screws 4 pcs and speaker bracket screws 2 pcs ...

Page 67: ...62 5 Remove the speaker box and MIC Avoid damaging the cables when removing the microphone with soldering iron 6 Remove the LCD FPC TP FPC 1 Remove the LCD FPC TP FPC a Remove two pieces of yellow mylar ...

Page 68: ...63 b After disconnect the LCD FPC with connectors then remove the LCD FPC 2 Remove the TP FPC a Disassemble the TP FPC connector ...

Page 69: ... rear camera and side key 1 Remove the rear camera a Use tweezers to remove the yellow mylar b Use plastic tweezers to gently disconnect the rear camera FPC and connector take out the camera and avoid damaging the FPC ...

Page 70: ...ently remove side key FPC from the disassembly location and the back gum behind the two FPCs should also be torn off b Side key FPC are soldered on MB as a MB module following steps should be noticed when removing the volume key FPC and power key FPC ...

Page 71: ...le is adhesive on the front housing cover with back gum use disassembly blade or plastic card to remove the MB module by inserting from the gap along the direction of the shown yellow frame 2 Disassemble the front camera gently to avoid the front camera being damaged Gap ...

Page 72: ...67 7 Remove the conductive cloth 1 and conductive cloth2 1 Tear off the conductive fabrics 1 with tweezers ...

Page 73: ...68 2 Tear off the conductive fabrics 2 with tweezers ...

Page 74: ...69 3 Tear off the conductive fabric 3 with tweezers 8 Remove the conductive foam 1 5 conductive cloth3 and antenna bracket 1 Use tweezers to remove 5 pieces of conductive foams one by one ...

Page 75: ...e cloth3 gently don t damage the white front housing cover 9 Separate CTP 1 Set the big head hot air gun to 210 whose air vent should keep 2cm far from the touch panel Heat the edge back and forth as below Hot air gun can stay longer when heating at the four corners ...

Page 76: ...71 2 Use a piece of micro fiber wiper non dust cloth to wrap up the disassembly blade or plastic card and insert it from the volume key location ...

Page 77: ...should not last too long when passing everywhere along the direction of shown yellow arrow 4 Then continue use the disassembly blade or plastic card to separate the touch panel from front cover Hot air gun can stay longer when heating at the four corners Remark Avoid the TP FCP being damaged during the separation process ...

Page 78: ...73 10 All spare parts of tablet are disassembled after the above steps ...

Page 79: ... shows blank screen white screen lines LCD FPC isn t well assembled re assemble LCD FPC FPC breaks replace LCD MB has defects Refer to MB Service Manual Link FPC isn t well assembled re assemble FPC Link FPC breaks replace Link FPC SW cause re update software FPC connector damages replace LCD 2 LCD has defective appearance LCD scratches replace LCD LCD is damaged replace LCD 1 Check if the FPC is ...

Page 80: ...ppearance has defects TP scratches replace TP TP is damaged replace TP 1 Check if LCD FPC is assembled in place without break 2 Use fixture to test LCD quality replace LCD if bad 3 Check and repair MB 1 Check if TP have scratches damages and defective appearance 2 Check if TP FPC is assembled in place or breaks 3 Use fixture to test TP quality replace it if bad 4 Check and repair MB ...

Page 81: ...lution 1 Side key button has no response Side FPC s connection has defects replace FPC Side key button has defects 1 replace the battery cover 2 replace side key FPC 1 Check and repair MB 1 Check the side key button s touching if it is assembled in place 2 Check if the side key FPC s DOME is flexible if the FPC is inserted in place 3 Check if the side key FPC is welded well ...

Page 82: ...d not working No function Rear camera FPC isn t well assembled re assemble camera FPC Rear camera is defective Replace the camera MB is damaged Repair MB 2 Cannot start the rear camera Rear camera is defective Replace the camera 3 Picture fault FPC isn t well assembled or connection has defects re assemble camera FPC Rear camera has defects Replace the camera MB is damaged Repair MB 3 Check if the...

Page 83: ... well assembled re assemble Front camera is defective Replace the camera MB is damaged Repair MB 9 GPS has no signal NO Issue Description Cause Solution 1 GPS has no signal GPS antenna isn t well assembled re assemble GPS antenna has defects replace GPS antenna MB is damaged Repair MB 1 Check if the camera FPC is assembled in place or breaks 2 Use fixture or good MB to test the camera quality 3 Ch...

Page 84: ...ace earphone MB is damaged Repair MB 12 Receiver speaker box issue NO Issue Description Cause Solution 1 Acoustic anomaly Speaker box has defects replace MB has defects Repair MB 2 No sound Speaker box connects poorly re assemble Speaker box has defects replace Speaker box MB has defects Repair MB 13 Microphone issue NO Issue Description Cause Solution 1 Acoustic problem MIC has defects replace Mi...

Page 85: ...harging but fail MB has defects Repair MB 2 Fail to fully charge Battery problem replace MB problem Repair MB 3 Fail to charge MB has defects Repair MB 1 Check if the connector of battery is connected well 2 Check the battery quality replace it if bad 3 Check and repair MB ...

Page 86: ...81 CHAPTER 4 Diagnostic Tool SOP Please use Acer ADS tool ...

Page 87: ...on ACER FG PN Year Week Sequence Number MM Version PPPPPPPPPP Acer FG PN which is from the BOM by PM 10 characters without dots here There are 12 characters in Acer FG PN with the format of 2 5 3 code including two dots For example LX G5808 039 Remove dots to get 10 characters of PPPPPPPPPP For example LXG5808039 YWW 1 digit of year and 2 digits for week code Y The last digit of year For example 9...

Page 88: ...ary 1995 is identified by the calendar date 1995 01 01 and week date 1994 W52 7 Tuesday 31 December 1996 is identified by the calendar date 1996 31 12 and week date 1997 W01 2 SSSSS 5 unique hexadecimal codes by manufacturer factory product base start form 00001 and reset every week Hexadecimal numeral system uses 16 digits they are 0 9 A B C D E and F Maintain one and only one counter to generate...

Page 89: ... 00014 Product Unit 11 12 13 14 15 16 17 18 19 20 hexadecimal codes 00015 00016 00017 00018 00019 0001A 0001B 0001C 0001D 0001E Product Unit 21 22 23 24 25 26 27 28 29 30 SSSSS One counter to generate sequence number even different platform product MM Manufacturer code two digits defined by Acer SIC It only apply by ODM manufacturer location not factory Use alphanumeric characters including 0 9 an...

Page 90: ... with a unique MM code VV Engineering version code of hardware two characters defined by ODM vendor Please use alphanumeric characters including 0 9 and A Z only Excluding O and I Special characters are not allowed here If ODM do not need to use this VV code keep it as 00 This code does not be used to generate SNID In other words a SNID code does not contain VV data ...

Page 91: ... same as Acer FG SN dddddd 6 decimal numbers transferred from 5 hexadecimal numbers SSSSS of Acer 22_Code_FG_SN Transfer formula for S1S2S3S4S5 The sequence number in decimal dddddd S1 164 S2 163 S3 162 S4 161 S5 Example If Acer FG SN SSSSS 001FD SNID dddddd 1 16 16 15 16 13 000509 SSSSS dec2hex value DDDDDD hex2dec value detail refer to MS excel Mmm The Mmm transferred from Alphanumeric MM code o...

Page 92: ...numbers into two parts Random assigned depending on production sequence 000001 to 491500 for model A 491501 to 983000 for model B 000001 for model A 1st FG 000002 for model B 2nd FG 000003 for model A 3rd FG 000004 for model A 4th FG 000005 for model B 5th FG 000006 for model A 6th FG 000007 for model B 7th FG 000008 for model B 8th FG etc Note 3 1 2A The SNID codes are Alphanumeric and can not co...

Page 93: ... web sites The resolution of barcode is 200 DPI 8 dot mm or higher Please take a look at the following figures to reference the locations of Acer FG label and itself http www adams1 com pub russadam 128code html http www barcode college com tw barcode htm Note 4 1 Acer label size is 1 cm 5 cm This label size is for reference only ODM can adjust a little the label size to meet physical requirements...

Page 94: ...89 Note 4 2 Every Acer FG SN in databases is the same as the characters and the meaning of barcode printed on its own label ...

Page 95: ... is almost the same as Acer FG SN Acer KC SN does not have its related SNID The following is its definition of every character Acer 22_Code_KC_SN PPPPPPPPPPYWWSSSSSMMVV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 22 Code P P P P P P P P P P Y W W S S S S S M M V V Definition ACER KC PN Ye ar Week Sequence Number MM Version PPPPPPPPPP Acer KC PN 2 5 3 code which is from the BOM by Acer...

Page 96: ...s is the same characters as shown on its own label including it barcode Note 6 0 2 Every ODM KC PN can be found in Acer SPL database Please contact with the Acer PIC in CSD Note 6 0 3 Acer KC PN is more important than Acer KC SN for repair centers ...

Page 97: ...t number changes will not be noted on the printed Service Guide For Acer Authorized Service Providers the Acer office may have a different part number code from those given in the FRU list of this printed Service Guide Users must use the local FRU list provided by the regional Acer office to order FRU parts for repair and service of customer machines NOTE To scrap or to return the defective parts ...

Page 98: ...93 Exploded Diagram and Description ...

Page 99: ... 1 8 LCD foam adhesive 6 9 HQ21900164000 LCD conductive foam 5 10 HQ20100757000 LCD 1 11 HQ21711098000 CTP 1 12 TP back foam adhesive 1 13 HQ20700892000 Front cover 1 14 HQ22230756000 LCD FPC 1 15 HQ22010292000 Side key FPC 1 16 HQ20330109000 Speaker box 1 17 HQ22100006000 Screw M1 4 4 5L 2 18 HQ21400398000 MIC rubber case 1 19 HQ20500058000 MIC 1 20 Speaker net 1 21 Battery back adhesive 2 22 Pre...

Page 100: ...ry Acer Part NO Description Battery KT 00104 001 Battery SONY AP14E Polymer 1S1P SONY 1 cell 3420mAh Main COMMON Cable 50 LB1N8 001 USB CABLE Cover 60 LB1N8 001 REAR COVER BLACK Optical Device 42 LB1N8 001 SIDEKEY BLACK ...

Page 101: ...1 Front Camera 5 5 2 95mm_30W_GC0312_FF 57 LB1N8 002 Rear Camera_6 5 6 5 4 25mm_200W_GC2355_FF 42 LB1N8 002 MIC RUBBER 50 LB1N8 002 ANTENNA SET LCD Module 6M LB1N8 001 LCD TOUCH MODULE 7 HD GLARE W FRONT COVER BLACK ...

Page 102: ...7 Mainboard Module NB LB111 001 Mainboard B1 760HD 16GB SKU LF W MIC SPEAKER SIDE PART CONDUCTIVE FABRIC MYLAR Miscellaneous BREAK SEAL LABEL SPONGE FOR FRONT CAMERA MYLAR FOR REAR CAMERA SCREW 1 4 4 mm ...

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