diff --git a/display.py b/display.py
index 8937340..3af4ddd 100644
--- a/display.py
+++ b/display.py
@@ -130,7 +130,9 @@ class Display:
     def version(self):
         self.term.write(bytes([ESC,ESC,1,0xf3]))
         reply = self.term.read(4)
-        assert reply[0:2] == ESCESC
+        if reply[0:2] != ESCESC:
+            print('make sure the display is not in test mode - touch through it first!')
+            raise ValueError(f'reply is not starting with ESCESC: {reply!r}')
         return self.term.read(reply[2]-1)
 
     def font(self, size):
@@ -274,8 +276,7 @@ if firmware:
     if tag[:4] != MAGIC:
         raise ValueError(f'{firmware} is not a valid firmware file')
     hwversion = d.version()
-    if tag[4:] == hwversion:
-        # print('firmware is already', pretty_version(hwversion))
+    if tag[4:] != hwversion:
         print('display version:', pretty_version(hwversion))
         print('binfile version:', pretty_version(tag[4:]))
         result = input('flash this (takes 1 min)? ').lower()
diff --git a/display_fw_psi.bin b/fw_display.bin
similarity index 100%
rename from display_fw_psi.bin
rename to fw_display.bin