Model: Legion 5 15IAX10
Describe the issue: When I connect my new apple studio display with thunderbolt 5 cord to my lenovo legion 5 laptop with thunderbolt 4 port, I hear the USB connected sound, but the apple display does not turn on.
What have you tried already?: Updating all drivers, trying all ports to connect to. Apple display works of course with my macbook pro.
When did it start producing the issue: Immedietly
Did you install new drivers or software?: Yes
Can you provide images/videos to show us the issue: No
#New Apple Studio Display Not Working
dreamy arch
hot fossil
Model: Legion 5 15IAX10
Describe the issue: When I connect my new apple studio d...
the TB port on the legion connects to the iGPU and isn't ideal anyways. have you tried connecting to the regular USB-C port, for a dGPU connection?
dreamy arch
yes
hot fossil
yes
ok, next up are the silly questions.
- the studio display is connected to external power? no issues with the wall power outlet?
- the TB cable is connected to the correct TB port on the monitor (the bolt with a dot)?
- the laptop is in Hybrid mode, to guarantee both iGPU and dGPU are active?
- all USB-C ports on the laptop do not work with the display?
after all that it's probably just incompatibility 
is the studio display firmware up to date?
https://support.apple.com/en-us/106345
dreamy arch
Yes to all of those.... Pretty disappointed.. Whole reason I bought this laptop was because of the thunderbolt 4 port to be able to use with the ASD.
hot fossil
Yes to all of those.... Pretty disappointed.. Whole reason I bought this laptop ...
reading online that it may be the cable that's not compatible. a USB-C cable with DP1.4 Alt Mode support might work.