We are still using QB POS 19.

Usually works fine, we run the server and 4 workstations.

Yesterday I had to replace a workstation. Downloaded POS, it got stuck on "reading receipts" for about 12 hrs. I closed it the next morning and then it worked fine.

Then it didn't. Could not find the company server file.

Then the other machines started losing connection for hours at a time. Some would later connect, others would not.

Most of the day only 1 workstation would connect. By end of day 2 were connected.

Its not a network issue, what else could be causing this and how could we fix it?