Those are hard to troubleshoot remotely. If it's in warranty, have them fix it. Try attaching an external monitor to see if the system is working and putting out video, which would limit the problem to the screen or its cables.
Those are hard to troubleshoot remotely. If it's in warranty, have them fix it. Try attaching an external monitor to see if the system is working and putting out video, which would limit the problem to the screen or its cables.