So these are the steps how to bring to life Mpx player.
This works for me after many trys, I don`t know if will work for other models of mpx player in the same way.
Player id Toprid, hardw. model MP-693C-SL MAIN V1.3 2005.12.14.
After uploading wrong firmw. player stop working completly.
So in shorts, this is a procedure :
1. Open mpx player - to be able to put mpx player in recovery mode (ADFU mode by short-circuit memory chip). This is described here:
http://www.s1mp3.org/en/docs_deadrec...a5f612d7#ancr3
It helps if your speakers are on - when you make a good short-circuit, you will hear it, beacouse your mpx player is now in recovery mode - and nothing hapens on pc screen - like icon pop-up or "found new hardware" stuff.
I lost at first a lot of time thinking nothing hapen, just beacouse sound on pc was off.
2. Then, when mpx player is in recovery mode, just start Mp3 Player upgrade tool and upgrade the firmware. This is not your backup firmware, he can`t be uploaded right now - "invalid or wrong firmware" message is shown.
You have to try some "basic" FULL firmware. You must trying here, until some ok firmware is accepted and uploaded to your mpx player.
For my Mpx player that was MP-683E-GC-V01 (FULL) firmware.
Then, turn off and then on mpx player and wait cca 10-15 sec - then for the 1st time a NEW drive icon appear in my computer window. Ok, mpx player is now recognized as some simple usb memory stick. Screen on mpx player is stil black. Don`t worry - thats normal.
3. Now it is time to bring mpx player in "real life" :-)
Start Mp3 Player upgrade tool again, and select your "normal" firmware.
If you are lucky, your (backuped) firmware will be accepted.
If not, you can try some other working firmware.
For now, I can`t upload my orginal firmware, but M3345 action solution
firmware (posted here by admin - thanks Binh!) was accepted.
Hope this help you.
Conclusion:
So, now mpx player work again , but not 100% as before. M3345 firmware is ver. 3.2.16 and my orginal was 3.5.3.5. All menus are the same, but just 1 thing is not ok - sound volume can go only down.
Binh help, maybe volume control is adjusted on some other way in M3345 player. Before, I just shortly pressed VOL control, and then left or right to adjust volume. This not working now :-(
Hope you can help, thanks
Also, I hope that I be able to find the way how to upgrade my orginal firmware again...