iFixit - Answers With Device "Lenovo ThinkPad T490"

Lenovo ThinkPad T490: How can I change the thermal paste?

Fri, 17 Apr 2026 05:33:33 -0700

Hello. can you please also upload the steps to change thermal paste of T490

⟐ Answered April 17, 2026 at 5:33 MST

Lenovo ThinkPad T490: Screen does not display but display on tv HDMI

Wed, 05 Feb 2025 00:23:33 -0700

Laptop in on but does not display on screen but display when connected to tv with HDMI

⟐ Answer edited February 05, 2025 at 0:23 MST

Lenovo ThinkPad T490: Why won’t my screen turn on

Thu, 10 Oct 2024 20:51:45 -0700

When i power on my pc the fan just runs continuously, but nothing appears on the screen. The led light for the charger turns on and ive already tried all the reset and battery drain troubleshooting

⟐ Answered October 10, 2024 at 20:51 MST

Lenovo ThinkPad T490: When I shut down fan starts spinning

Sun, 09 Jun 2024 06:52:50 -0700

My laptop works fine till it is turned off. When I shut down it fan starts spinning in full speed. When I turn on laptop again it starts working normally

⟐ Commented June 09, 2024 at 6:52 MST

Lenovo ThinkPad T490: No signs of live as with battery plugged in - battery or mainboard?

Thu, 17 Jul 2025 02:48:46 -0700

Hi⏎

I have a used Lenovo T490 in great condition. Everything worked, it was charging, the battery reports 91% health and ~110 charge cycles. Then I gave it to a friend so she could play around with Linux.⏎
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On the third day or so, she put the laptop down and it suddenly turned off. It won't turn on, and when plugged into the charger, no LEDs light up (e.g. power button or charging indicator).⏎
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What I discovered:

Laptop works fine with internal battery disconnected.
When I disconnect and reconnect the internal battery, the charge indicator LEDs light up when I plug in a charger. As soon as I press the power button, it turns off again.
I can start the laptop with the internal battery disconnected and then plug it in again while the laptop is running. The operating system recognizes the battery and says it has a charge of 77%.
The battery does not appear to be damaged or swollen.

Before ordering a new battery, is there anything I can check to make sure the problem isn't with the mainboard or charging circuit?

⟐ Commented July 17, 2025 at 2:48 MST

Lenovo ThinkPad T490: Computer was working, then powered down. Can't restart

Tue, 31 Dec 2024 15:48:58 -0700

Computer was working, ather monitor was added and everything was OK. Then computer powered off and I can't start it.

Where should I look?

⟐ Commented December 31, 2024 at 15:48 MST