Black screen or popularly known as BSOD can occur at any time on any computer. Dell users confront this problem many times. But this can only be rectified by the proper fixture. It is suggested that the process of troubleshooting is quite lengthy and you might get confused so you can reach out to Dell customer service so as to resolve the hassle in no time.
You can try a hard reboot of the device and enter through the safe mode. Thereafter system restore is crucial. This will surely eliminate the problem from its roots.
Visit here: Dell technical support number