After installing SharePoint 2013. I had open the central admin page, But it does not have any image and CSS style.
social.technet.microsoft.com/Forums/en-US/…– Dipen ShahJan 5, 2016 at 8:45
Are there any error messages when you installed SP?
Try to run configuration wizard again.
Check if the Windows Authentication is enable (in IIS > sites > CA). If not, enable and rest iis.
Several similar post with solutions for your reference: https://social.technet.microsoft.com/Forums/en-US/3353ad18-4390-4576-90bd-7b91e4e1f577/central-administration-blank-page-after-successful-installation?forum=sharepointadmin https://hpatel.wordpress.com/2013/12/11/getting-blank-for-sharepoint-central-administration-after-installing-sharepoint-2010-in-windows-7-64-bit/