Contents | Lenovo TC A55-9636, 9638, 9643, 9644, 9645, 9640 manual

Important safety information	.		v	Accessing system board components and drives .	. 22
Conditions that require immediate action . . .	.	. v		Identifying parts on the system board . . . .	. 23
General safety guidelines	. vi			Installing memory	.	24
Service and upgrades	. vi			Installing PCI adapters	.	25
Static electricity prevention	. vii			Installing internal drives	.	26
Power cords and power adapters	. viii			Drive specifications	.	27
Voltage-selection switch	. viii			Installing a drive in bay 2	.	28
Extension cords and related devices . . . .	. ix			Installing a diskette drive in bay 3	.	30
Plugs and outlets	. ix			Security features	.	32
External devices	. ix			Integrated cable lock	.	33
Batteries	. ix			Password protection	.	33
Heat and product ventilation	.	. x		Changing the battery	.	33
Operating environment	. xi			Erasing a lost or forgotten password (clearing
Electrical current safety information	. xi			CMOS)	.	34
Lithium battery notice	. xii			Closing the cover and connecting the cables . .	.	35
Modem safety information	. xii			Chapter 4. Recovering software . . .	.	37
Laser compliance statement	. xiii
Power supply statement	. xiii			Creating and using the Product Recovery disc . .	. 37
Data safety	. xiv			Performing backup and recovery operations . .	.	38
Cleaning and maintenance	. xiv			Using the Rescue and Recovery workspace . . .	. 39
Additional safety information	. xiv			Creating and using rescue media	.	40
Introduction	. xv			Creating and using a Recovery Repair diskette .	. 41
				Recovering or installing device drivers . . . .	.	42
				Setting a rescue device in the startup sequence .	. 43
Chapter 1. Arranging your workspace .	. 1			Solving recovery problems	.	43
Comfort		.	1	Chapter 5. Using the Setup Utility . .	.	45
Glare and lighting	.	.	1
				Starting the Setup Utility program	.	45
Air circulation	.	.	2
Electrical outlets and cable lengths	.	.	2	Viewing and changing settings	.	45
				Using passwords	.	45
Chapter 2. Setting up your computer .	. 3			Password considerations	.	45
Connecting your computer	.	.	3	User Password	.	46
				Administrator Password	.	46
Turning on power	.	.	8
				Setting, changing, and deleting a password . . . 46
Finishing the software installation	.	.	8
				Using Security Profile by Device	.	46
Completing important tasks	.	.	8
				Selecting a startup device	.	47
Updating your operating system	.	.	9
				Selecting a temporary startup device . . . .	.	47
Installing other operating systems	.	.	9
				Changing the startup device sequence . . .	. 47
Updating your antivirus software	.	.	9
				Advanced settings	.	48
Shutting down the computer	.	.	9
				Exiting from the Setup Utility program . . . .	. 48

Chapter 3. Installing options . . . .	.	11		Chapter 6. Updating system programs		49
Features	.		11
				Using system programs	.	49
Available options	.		14
				Updating (flashing) BIOS from a diskette or
Specifications	.		15
				CD-ROM	.	49
Supported operating positions	.		16
				Updating (flashing) BIOS from your operating
Tools required	.		16
				system	.	50
Handling static-sensitive devices	.		16
				Recovering from a POST/BIOS update failure . .	. 50
Installing external options	.		17

Locating controls and connectors on the front of				Chapter 7. Troubleshooting and
your computer	.		17
				diagnostics	.	53
Locating connectors on the rear of your computer 18
Obtaining device drivers	.		19	Basic troubleshooting	.	53
Opening the cover	.		20	Diagnostic programs	.	54
Locating components	.		21	PC-Doctor for Windows	.	55

iii

TC A55-9636, 9640, 9645, 9644, 9643 specifications

Lenovo has consistently been at the forefront of innovation in the computing world, with a range of laptops and desktops that cater to a variety of needs and preferences. Among their popular offerings are the Lenovo 9640, 9643, TC A55-9636, 9644, and 9645. Each of these models is designed to provide exceptional performance, reliability, and user-friendly experience, making them appealing choices for both personal and business use.

The Lenovo 9640 is renowned for its sleek design and powerful performance. This model is equipped with the latest Intel processors, ensuring smooth multitasking and efficient power consumption. It features a vibrant display that provides excellent color accuracy and vivid visuals, making it ideal for content creators and casual users alike. With ample storage options and high-speed SSD configurations, users can expect fast boot times and quick file access.

Similarly, the Lenovo 9643 builds on this legacy, offering enhanced graphics capabilities with dedicated GPU options. This feature is particularly beneficial for gamers and professionals who rely on graphical performance for tasks such as video editing or 3D modeling. The 9643 also emphasizes connectivity, providing a range of ports, including USB-C, HDMI, and Ethernet, ensuring users can easily connect to peripherals and networks.

The TC A55-9636 is Lenovo's entry into the compact desktop market, designed for users seeking a powerful, space-saving solution. With its robust performance metrics and energy-efficient components, the A55-9636 is perfect for both home and office environments. It supports a variety of multitasking scenarios, making it suitable for productivity-driven tasks, while its expandable architecture means users can upgrade components as their needs evolve.

The Lenovo 9644 and 9645 round out this impressive lineup with their focus on business-centric features. These models provide enhanced security options, including fingerprint readers and TPM chips, catering to enterprises that prioritize data protection. With long battery life and solid build quality, both models promise durability and reliability, critical for professionals who are always on the go.

All models in this series showcase Lenovo's commitment to sustainability, incorporating eco-friendly materials and energy-efficient technologies. The user-friendly interfaces across the devices ensure a seamless experience, meeting the demands of a broad user base from students to business executives. In summary, the Lenovo 9640, 9643, TC A55-9636, 9644, and 9645 represent a versatile range of computing solutions that combine cutting-edge technology with efficiency, ensuring users can achieve their goals effectively and stylishly.