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P2417H, Dual, Lenovo T480, 3 screens
I have Lenovo T480 and I'm trying to connect my two screens and extend the screen. One screen is connected with HDMI cable and other USB C port. Both work as I disconnect one of them, if both are connected it only detects the C port screen. In display settings only two screens are shown, laptop and one screen. Both are the same model Dell P2417H. Have tried updating drivers, restarting and everything, nothing works. The strange thing is it worked before and there was no problem connecting the two screens to the laptop. Any suggestions?
DELL-Chris M
Community Manager
Community Manager
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54.1K Posts
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July 12th, 2018 04:00
If they both worked prior to this, then some driver change on the Lenovo T480 is the culprit, not the monitors. To verify this, test both P2417H on a different PC. You should disconnect both P2417H and their cabling from the Lenovo T480. Restart the Lenovo T480. Go here and download/install the latest drivers directly from Lenovo. When done, restart the laptop and retest. If still no go, post the issue on the Lenovo Forum to get help from other T480 owners.
Lenovo T480 video out ports =
Two USB 3.1 Gen 1 (one Always On)
USB 3.1 Type-C Gen 1
USB 3.1 Type-C Gen 2/TB3
HDMI 1.4b
S2718HN/NX video cables provided in box =
HDMI to HDMI
VGA to VGA
S2718HN/NX video in ports =
HDMI
VGA
Possible connection setup =
Lenovo T480 HDMI out port --> S2718HN/NX HDMI ti HDMI cable --> #1 S2718HN/NX HDMI in port
Lenovo T480 USB 3.1 Type-C Gen 2/TB3 --> TB3 to HDMI cable --> #2 S2718HN/NX HDMI in port