Hello @Lorne Tweed
Thank you for reaching out to the Community regarding your issue, although I am sorry to hear that you are experiencing issues with your Synchrony accounts. That is quite a while they've been disconnected so I'm wondering if we might need to add the accounts as new then link them to get more information or connect them again. I'll leave steps on how to do so down below.
First we'll try deactivating all of the accounts for the affected FI. You can do so by following the article listed down below.
https://www.quicken.com/support/deactivate-online-banking-services-quicken-accountOnce all the accounts are deactivated go ahead and follow the article here on reconnecting the accounts. You'll want to make sure you're using the add account option then linking to an existing account.https://help.quicken.com/pages/viewpage.action?pageId=3216277
Once you get a chance to try these steps, please let us know what you find. From there we'll better understand our next steps/options.
Thanks,
Quicken Francisco