You should set the code page used in the `chcp' command should match the encoding used in the file.
If Notepad recognises the file, it must be in one of the encodings that Notepad recognises:
ANSI ................. Usually Windows Latin-1, code page 1252.
Unicode .............. UTF-16 Little Endian with Byte Order Mark (BOM).
Unicode Big-endian ... UTF-16 big-endian with BOM.
UTF-8................. UTF-8 with BOM.
So, if the file was encoded in UTF-8 Unicode, you could use
As barlop commented below: "UTF-16 code pages are not supported in Command Prompt windows." Therefore in order to display data from UTF-16 files, the best you can do is probably to convert such files to UTF-8 using either Notepad or another suitable tool (perhaps iconv or recode).
You should also set the font of the Command Prompt window to a font containing the particular characters you need to display. For example Lucida Console, if appropriate.
You can do this from the context menu (right mouse button click) on the title-bar of the window, select the "Properties" option.
If you have a monospaced font whose character set includes the specific characters you need, you can adapt these instructions to make the command prompt window use that font.
See related question https://stackoverflow.com/questions/4572393/perl-unicode-glitch