Blank Orders page in Admin

Recently moved and was updating the zipcodes for the shipping information in my shop. Everything in checkout looks fine and works like it should, but when I go to the Orders page in Admin all I'm getting is a blank page. Log folder shows no new error files, so I don't even know where to begin to see what's wrong. Help? Using v1.5.4, the most up to date version of Ajeh's USPS plugin, and a few other plugins that haven't been touched since the problem started.

Blank page issues
https://www.zen-cart.com/content.php?124-i-am-getting-a-blank-page-%28or-blank-part-of-a-page%29

I went through that, but there is no debug error. I've replaced the current file with a completely unedited version of orders.php and I'm still getting a blank page.

PHP Version? (please determine this by logging into the Zen Cart admin and clicking on "version").

Are any other administrative pages blank (if so which ones - or are they all)?

Is your browser reporting HTTP 200, HTTP 500, etc (may need to install / open firebug or developer tools - then check the network tab)?

Have you applied all of the relevant fixes for Zen Cart 1.5.4?

Have you tried uploading a completely clean copy of the entire Zen Cart administrative folder (with "/admin/includes/configure.php" copied from the existing)?

Another good reference (after checking / reporting the above information), is the article on diagnosing obscure issues.

lhungil:

PHP Version? (please determine this by logging into the Zen Cart admin and clicking on "version").

PHP Version: 5.6.15

lhungil:

Are any other administrative pages blank (if so which ones - or are they all)?

None that I have found. Everything else in Customers works as well as all other tabs. It's just the orders.php that is showing a blank.

lhungil:

Is your browser reporting HTTP 200, HTTP 500, etc (may need to install / open firebug or developer tools - then check the network tab)?

Unless I've completely missed something, there's nothing. No error, no nothing.

lhungil:

Have you applied all of the relevant fixes for Zen Cart 1.5.4?

Not seeing any fixes that are relevant to the problem.

lhungil:

Have you tried uploading a completely clean copy of the entire Zen Cart administrative folder (with "/admin/includes/configure.php" copied from the existing)?

Not yet, was going to make it my last ditch attempt if no one knew any easy fix. Will probably try it now since nothing else seems to be working.

lhungil:

Another good reference (after checking / reporting the above information), is the article on diagnosing obscure issues.

Appreciate your help. This is driving me insane.

You might try reloading just your admin files first

I did that and it seems to be working now. Something in the language folder was busted, but it definitely wasn't the orders.php page since I replaced that with a clean file first and nothing happened. I don't know what I was, but I really appreciate the help from both of you.