Fllex , the Hynix 27uu088g5m is a 8Gigabit (1GigaByte) memory chip. So if the seller sold it to you as 8GB, then it has been hacked.
Your player would be using the v9.0.xx series firmwares here
http://www.mympxplayer.org/actions-9...mare-dc37.html
You'll need to try every single one for 1.5" screen until you get it working again.
If it does not, then there is nothing much you can do as the firmware extraction tool S1fwx currently only supports upto v9.0.43, so others with a working player are unable to dump their firmware for you to try.