What confuses me is that you are talking about PLAY FROM. This is only relevant when you entered the TRIM mode (MODE + PAD6). Is that what you're talking about?
Otherwise you might try to interpret PLAY FROM like 'play my sample'. But instead you just hit PAD15. Then it matters if you assigned a sample to PAD15 in the program which is set for the current track.
Please try the following:
- Load your samples as you did before.
- Press MODE + PAD7 (Program Mode). Navigate the cursor to the right of "Pgm", hit WINDOW, F3 (new program), and hit DO IT.
- Cursor down to the right of the "1" (or hit PAD1) and then turn the DATA WHEEL. Now you should be able to scroll through the samples you loaded before (they will be at the very end of the list).
Enable FULL LEVEL and hit PAD1 (the pad you assigned a sample to). There should definitely be some sound now.
(actually this was a paraphrasation of page 58 in the manual (
http://www.akaipro.com/company/media2.php?download_id=DWJXMwRmAWM%3D) -- but I was not quite sure if you already studied this document)
Please check that. In case there is sound, then your MPC works properly I guess. You should consider studying the manual in more depth. In case there is still no sound, it is a strange thing. Double-check it with other samples and so on...
Another try:
Nr. 1 is loaded by the autoload function right? So that one should work (as long as you didn't overwrite the autoload with some strange data). So try going to the MAIN screen, cursor down to the right of "Pgm:" and select a program with the DATA WHEEL (in standard autoload there should be a program DJ-Hip_Set and so on. Ensure that FULL LEVEL is activated and that Bank A is lighted. Hit e.g. PAD2, PAD3, PAD6, PAD7. There should be samples playing. In this case PAD15 ("PLAY FROM") might not work because there might be no sample assigned to this pad.