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及時雨
Fanfold Paper
Posts: 13
Registered: ‎02-25-2018
Location: TW
Views: 2,993
Message 1 of 23

Missing Thunderbolt on 720S-14IKB

HI!

 

I bought an ideapad 720s-14IKB with 8th gen processor

i5-8250u/4GB RAM/MX150 this model.

 

I don't found any thunderbolt 3 controller information on my laptop by using HWINFO:

01.PNG02.PNG

 

 

 

The dirver I used is DS500874 and I have installed Intel TB3 Software manually.

I still can't find my controller. However, other user in this forum show a normal controller inspection:

03.pngI think this is driver problem but I have tried reinstallation many time and failed.

 

 

Note:

1. I have do a clean install of Windows 10 1709 just after I bought this machine.

2. My BIOS version is somehow strange "6LCN17WWV1.03" which can't find on Lenovo official support.

3. Full Lenovo Vantage diagnosis is done but no problem founded.

 

hunnyxhoney
Paper Tape
Posts: 2
Registered: ‎03-25-2018
Location: TH
Views: 2,850
Message 2 of 23

Re: Missing Thunderbolt on 720S-14IKB

I have this problem too I guess it's possibly about bios version because i've got bios ver.6LCN17WWV1.03 too and other user in this forum (ur ref pic) is ver.6LCN16WWV1.02 and i dont know how to downgrade bios version, if u can solve this problem please let me know how to fix it thank you sir. sorry for my english
及時雨
Fanfold Paper
Posts: 13
Registered: ‎02-25-2018
Location: TW
Views: 2,837
Message 3 of 23

Re: Missing Thunderbolt on 720S-14IKB

OK! I have ever tried to downgrade the BIOS but failed.

I also found that if I inser at least one usb type-c device into thunderbolt 3 port,

the alpine ridge JHL6240 device would be founded in HWinfo!

 

However in this case, the thunderbolt 3 controller firmware still unknown.

This same situation is the same as some DELL XPS 13 device, too.

So I don't care to much about it.

 

hunnyxhoney
Paper Tape
Posts: 2
Registered: ‎03-25-2018
Location: TH
Views: 2,823
Message 4 of 23

Re: Missing Thunderbolt on 720S-14IKB

thank you sir , and i have some question. the thunderbolt port can it connect with external gpu?

TiesB
Paper Tape
Posts: 7
Registered: ‎04-24-2018
Location: NL
Views: 2,616
Message 5 of 23

Re: Missing Thunderbolt on 720S-14IKB

Hey guys,

 

Having the same problem. Had to do a fresh install of windows and now the thunderbolt port doesn't work correctly anymore. Did you find a solution eventually?

及時雨
Fanfold Paper
Posts: 13
Registered: ‎02-25-2018
Location: TW
Views: 2,612
Message 6 of 23

Re: Missing Thunderbolt on 720S-14IKB

Hey @TiesB
Do you mean there is no response after you connect thunderbolt 3 device with 720s-14ikb ?

What is your thunderbolt 3 device ?
TiesB
Paper Tape
Posts: 7
Registered: ‎04-24-2018
Location: NL
Views: 2,610
Message 7 of 23

Re: Missing Thunderbolt on 720S-14IKB

Hey, thanks for your reply!

 

But it's even before plugging something in. I can't even seem to get the driver and software properly installed. I got the software from a different package from the Intel website. But as you can see in the printscreen the software doesn't see the driver..

I can also remember that before I did the clean install of Windows that i could see somewhere that it was compatible with an eGPU. (What i want to achieve).

I did install the driver from the lenovo support website for my laptop, nut still nothing..

 

 

及時雨
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Posts: 13
Registered: ‎02-25-2018
Location: TW
Views: 2,599
Message 8 of 23

Re: Missing Thunderbolt on 720S-14IKB

OK! I think this is the problem.

We don't have such an evidence prove that the original factory 720s-14ikb is not capable of thunderbolt 3.

 

I will try to examine eGPU capability by borrowing eGPU enclosure from netizens.

If I am lucky I will get result soon.

 

 

TiesB
Paper Tape
Posts: 7
Registered: ‎04-24-2018
Location: NL
Views: 2,598
Message 9 of 23

Re: Missing Thunderbolt on 720S-14IKB

I see i forgot to include the screenshot..!

及時雨
Fanfold Paper
Posts: 13
Registered: ‎02-25-2018
Location: TW
Views: 2,596
Message 10 of 23

Re: Missing Thunderbolt on 720S-14IKB

yeah! Is this exactly the screenshot of original 720s-14ikb with no clean install ?

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