Please provide the following details:
1. System Model
2. Are you getting the Dell Logo when you turn on the system
3. Did you get the operating system disk with the system?
If you did not get the operating system disk, you can request the disk using the link mentioned below:
NOTE: The link is for US only.
If you have the disk, you can perform the installation using the link mentioned below:
NOTE: Operating system re-installation leads to data loss.
Thanks & Regards