Lenovo ThinkPad T490 Hardware Maintenance Manual

To create a bootable diagnostic medium, do the following:
1. Go to
https://www.lenovo.com/diags.
2. Click Lenovo Bootable Diagnostics.
3. Follow the instructions on the Web site to create a bootable diagnostic medium on a USB device or disc.
To use the diagnostic medium you have created, do one of the following:
• If you have created the bootable diagnostic medium on a USB device, do the following:
1. Attach the USB device to the computer.
2. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page
28, and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on
page 37 for error code descriptions and troubleshooting hints.
3. When the ThinkPad logo is displayed, repeatedly press and release the F12 key. When the Boot Menu
window opens, release the F12 key.
4. Use the arrow keys to select USB HDD and then press Enter. The diagnostic program launches.
5. Follow the instructions on the screen to use the diagnostic program.
• If you have created the bootable diagnostic medium using a disc, do the following:
1. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page
28, and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on
page 37 for error code descriptions and troubleshooting hints.
2. Insert the disc into the optical drive.
3. Restart the computer.
4. When the ThinkPad logo is displayed, repeatedly press and release the F12 key. When the Boot Menu
window opens, release the F12 key.
5. Use the arrow keys to select ATAPI CDx (x: 0, 1, ...) and then press Enter. The diagnostic program
launches.
6. Follow the instructions on the screen to use the diagnostic program.
Power system checkout
To verify if a battery or an ac power adapter is functional, do the following:
1. Turn off the computer.
2. Connect the ac power adapter.
3. Turn on the computer. If the computer can be turned on, it means that either the battery or the ac power
adapter is functional.
4. Insert a straightened paper clip into the emergency-reset hole to reset the computer. If the computer is
still powered on, it means that the ac power adapter is functional.
5. Turn off the computer.
6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it means
that the battery is functional.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
• “Checking the ac power adapter” on page 28
• “Checking the built-in battery and operational charging” on page 29
• “Checking the coin-cell battery” on page 29
Checking the ac power adapter
You are here because the computer fails only when the ac power adapter is used.
• If the power problem occurs only when the docking station or the port replicator is used, replace the
docking station or the port replicator.
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T490 and P43s Hardware Maintenance Manual

Lenovo ThinkPad T490 Specifications

General

Form factor	Clamshell
Product type	Ultrabook
Product color	Black
Market positioning	Business
LED backlight	Yes
Display diagonal	14 \
Bus type	OPI
Tjunction	100 °C
Processor cache	6 MB
Processor cores	4
Processor model	i5-8265U
System bus rate	4 GT/s
Processor family	Intel® Core™ i5
Processor socket	BGA 1528
Processor threads	8
Processor codename	Whiskey Lake
Configurable TDP-up	25 W
Processor frequency	1.6 GHz
Processor cache type	Smart Cache
Configurable TDP-down	10 W
Processor lithography	14 nm
Processor manufacturer	Intel
PCI Express slots version	3.0
Processor boost frequency	3.9 GHz
Processor operating modes	64-bit
PCI Express configurations	1x4, 2x2
Thermal Design Power (TDP)	15 W
Configurable TDP-up frequency	1.8 GHz
Configurable TDP-down frequency	0.8 GHz
Maximum number of PCI Express lanes	16
Internal memory	8 GB
Memory clock speed	2400 MHz
Internal memory type	DDR4-SDRAM
Maximum internal memory	- GB
SSD capacity	The Solid State Drive's storage capacity in Gigabytes.
SSD interface	SATA III
Storage media	SSD
Total storage capacity	256 GB
Compatible memory cards	MicroSD (TransFlash)
Number of SSDs installed	1
On-board graphics card ID	0x3EA0
Discrete graphics card model	Not available
On-board graphics card family	Intel® UHD Graphics
Maximum on-board graphics card memory	32 GB
On-board graphics card OpenGL version	4.5
On-board graphics card base frequency	300 MHz
On-board graphics card DirectX version	12.0
On-board graphics card dynamic frequency (max)	1100 MHz
Number of built-in speakers	2
Antenna type	-
Wi-Fi standards	802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Top Wi-Fi standard	Wi-Fi 5 (802.11ac)
Ethernet LAN data rates	100, 1000 Mbit/s
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Keyboard layout	QWERTY
Pointing device	Touchpad
Number of battery cells	3
AC adapter power	65 W
Processor ARK ID	149088
Processor package size	46x24 mm
Supported instruction sets	AVX 2.0, SSE4.1, SSE4.2
Intel Identity Protection Technology version	1.00
Intel Stable Image Platform Program (SIPP) version	0.00

Weight and Dimensions

Depth	227 mm
Width	329 mm
Height	17.9 mm
Weight	1460 g