I have a Lenovo T480s running Windows 10, but its internal display no longer works. I can currently access it through RDP from a MacBook, and an HDMI-connected TV or monitor becomes usable once Windows reaches the lock screen. However, the external display shows nothing during BIOS, POST, or boot menus. I want to completely replace Windows with Ubuntu Server while minimizing the chance of losing access. I have a 32 GB USB drive, a 512 GB external drive, Wi-Fi, Ethernet, and a MacBook available. What is the safest installation approach?
4 Answers
The safest approach is probably to remove the SSD and install Ubuntu on it using another computer with a working display, then reinstall the drive in the Lenovo. Before changing anything, make a full backup of the existing Windows drive. When installing, use the same boot mode the laptop currently uses—UEFI versus legacy/CSM—or it may not boot afterward. During installation, include SSH and any remote-management tools you’ll need, then test the drive in the Lenovo before relying on it headlessly.
Installing through a live environment and enabling SSH or xrdp before removing the graphical environment can work, but it is much riskier when you cannot see the installer. Imaging the prepared system onto the Lenovo drive with a disk-imaging tool is possible too, but the separate-computer installation is generally simpler. Intel AMT or vPro remote KVM may help only if the exact hardware supports it and the feature was already enabled in firmware; enabling it usually requires local firmware access.
A remote-management feature should not be treated as the main plan unless you have already confirmed that it works on this specific T480s. Many systems advertise vPro-related capabilities without having usable remote KVM configured.
Disconnecting the damaged internal display cable is another option. The firmware may then detect that the only available display is the HDMI or USB-C monitor and send POST and setup screens there. Work carefully, disconnect power and the battery if practical, and confirm the exact cable before unplugging anything. This is worth trying before wiping Windows, since losing access to firmware settings could leave you unable to recover from a failed boot.
Before opening the laptop, try to make the external display active during startup. On some Lenovo systems, closing the lid before powering on, using the display-toggle function key, or connecting through the appropriate USB-C video output can make firmware screens appear externally. You may need to press the display-toggle key repeatedly immediately after power-on. If you can reach the firmware settings, configure the external output as the primary display and verify the boot order before starting the reinstall.
This avoids having to guess through the firmware menus, which is especially useful when the internal panel is completely unusable. I’d also test the Ubuntu installation on the replacement machine before moving the drive, if possible.