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DisplayPort on T410s not working after connecting to Sony Bravia TV (stopped functioning)

T400/410/420 and T500/510/520 series specific matters only
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Joined: Mon Feb 18, 2019 12:57 pm
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DisplayPort on T410s not working after connecting to Sony Bravia TV (stopped functioning)

#1 Post by Marcus_Tethýs » Mon Feb 18, 2019 1:06 pm

Dear ThinkPads-community,

(I hope my system's details appear in the signature.)

I had the following problem with a Sony Bravia TV, Model KDL-40S5650, using a DisplayPort-to-HDMI converter:

I used the converter to attach a HDMI cable from my laptop (DisplayPort) to the HDMI input of the TV (it has 3 inputs). I used the TV as a standard screen. It worked for a short time, I could use it as a display, watching videos/movies or just working. But then messages like "out of range" appeared on the Sony TV and connection was lost in an on-off manner. Until the connection was lost at all. This happened after another, successively, with each of the three HDMI inputs of the TV until I cannot connect my TV with the Sony TV anymore. (I think at some point I also heard some snapping noises at/in the TV.) - What could be wrong with my DisplayPort?

Notes: I tried resetting the TV, it doesnt help. I used another Laptop to connect with the TV, it works. (But it is HDMI to HDMI without using a converter). All 3 inputs work in that HDMI-to-HDMI manner. Now I am connected with the TV and this laptop via a VGA cable. Which worked since without a problem. I have not tried to connect via converter to other displays yet to see if it only stopped working with exactly this TV screen.

(off-topic Q: what other system info is generally important?)
System: Lenovo ThinkPad T410s, Win10 Pro, 64 bit, 8 GB RAM, Intel Core i5 M540 2.53 GHz, BIOS: Lenovo 6UET70WW (1.50) 11-10-2012; graphics: Nvidia NVS 3100M (+turned off integrated Intel graphics), LCD 1440x900, HD SSD Toshiba

Posts: 8202
Joined: Sat Oct 29, 2005 6:20 am
Location: Israel

Re: DisplayPort on T410s not working after connecting to Sony Bravia TV (stopped functioning)

#2 Post by dr_st » Mon Feb 18, 2019 2:52 pm

Welcome to the forum. :)

Sorry to hear about your troubles.

Question #1: is this some sort of active DisplayPort to HDMI converter? If so, try a passive one - the T410s should output HDMI over the DisplayPort connector when it detects an HDMI screen at the other end. Make sure the video drivers are as up-to-date as possible.
Thinkpad 25 (20K7), X1 Carbon (20HQ), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad, A21m 2628-GXU

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