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dynabook TECRA A40-J Series Maintenance Manual

dynabook TECRA A40-J Series
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Maintenance Manual (960-945) iv
Table of Contents
Chapter 1 Hardware Overview
1.1 Features and System Unit Block Diagram . . . . . . . . . . . . . . . . 1-1
1.2 SSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.3 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.4 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.5 Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.6 Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1.7 AC adaptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
1.8 USB Type-C Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Chapter 2 Troubleshooting Procedures
2.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.3 Power Supply Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.4 System Board Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2.5 USB Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2.6 SSD Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
2.7 Keyboard Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
2.8 Touch Pad (Click Pad) Troubleshooting . . . . . . . . . . . . . . . . . 2-15
2.9 Display Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
2.10 Wireless LAN + Bluetooth Troubleshooting . . . . . . . . . . . . . 2-17
2.11 3G/LTE Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
2.12 Sound Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
2.13 Memory media (SD Card) Slot Troubleshooting . . . . . . . . . . 2-22
2.14 Fingerprint sensor Troubleshooting . . . . . . . . . . . . . . . . . . . 2-23
2.15 Web camera Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 2-25
2.16 HDMI Port Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
2.17 LAN Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
2.18 USB Type-C adapter Troubleshooting. . . . . . . . . . . . . . . . . . 2-28
Chapter 3 Tests and Diagnostics
3.1 Test program for maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 How to execute the test program . . . . . . . . . . . . . . . . . . . . . . . . 3-2

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dynabook TECRA A40-J Series Specifications

General IconGeneral
Operating SystemWindows 10 Pro
Battery LifeUp to 10 hours
GraphicsIntel Iris Xe Graphics
BluetoothBluetooth 5.1
ProcessorIntel Core i5-1135G7 or i7-1165G7
Display14.0" FHD (1920 x 1080) Anti-Glare
RAM8GB/16GB DDR4
Storage256GB/512GB SSD
WirelessIntel Wi-Fi 6 AX201
Ports2 x USB 3.2 Type-A, 1 x USB 3.2 Type-C, HDMI, Ethernet, MicroSD card slot
SecurityFingerprint Reader, TPM 2.0
WebcamHD Webcam

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