tttbrian, A hacked player is when the manufacturer or seller reprogrames the chip by way of a software hack so that the chip reads larger than it's true size. This way the player can be sold for far more profit and rip-off the poor buyer. Some players actually have chips as small as 128MB but read as 4 & 8GB. Once you start loading the player with files over it's true capacity you start to experience file corruption, file duplication, files that can not be deleted, player restarts and system crashes. Eventually the firmware becomes corrupted and the player will no longer work.

you are not alone many buyers are scammed by these fraudsters.
Check out these links for more info.

http://www.petitiononline.com/eBay666/petition.html
http://www.mympxplayer.org/feedback-...rs-vt2828.html
http://www.mympxplayer.org/62-ebay-t...rs-vt3556.html
http://www.mympxplayer.org/hotmale16...nz-vt2786.html
http://www.mympxplayer.org/previous-...days=0&start=0
http://www.mympxplayer.org/how-to-re...ck-vt2400.html

tttbrian, As I suspected the ATJ2091 is one of the newer chips and uses the 9.0.XX series firmware. Because there are no tools yet to backup these firmware versions there are very few available for download which makes it near on impossible to recover a player once it crashes.
You will find the few we have on site here.
http://www.mympxplayer.org/actions-9...mare-dc37.html
http://www.mympxplayer.org/full-firmware-dc35.html

Re: I see usb adfu but I can't see it under my computer
 

So for the driver do I use the same adfuupdate.inf and adfuupdate.sys files? If I can't get the computer to recognize the player I can't even try those firmware versions. Also what mp3 tool do I use to download the firmware? The ones here aren't working for me. Thanks!

tttbrian, Every version of MP3 Player Utilities has a MP3 Update Utility. For the newer version chips you will be better trying versions 4.05, 4.07, or 4.09 my understanding of "Chigoogle" translation is that these versions were optimized for the new chipsets and larger screen players.
If the player is not being recognised by the Update tool you may need to short the memory chip to reset as shown in the Dead Player Recovery Guide
http://www.mympxplayer.org/dead-play...ide-vt567.html

Re: I see usb adfu but I can't see it under my computer
 

I have shorted the chip several times. It must be a lost cause at this point. Thanks for the advice.