I have installed Magento 2.1.6 and had lot's of products over it. then i download fresh copy of magento 2.1.7 from magento market place and extracted and used my previous database that was had lot's of products and order histories etc.
the website start working fine . now i migrate Media folder from old website directory to new website directory same in pub folder
now images start working fine. but when i see on product detail page images not showing else all images showing any help?