Here is MARS TEAM RESPONSE
The A750 is designed dedicatedly for the main-board version No. GH-037-11 or
GH-037-01 at the debut of PSTwo 75001; the main-board version No. other than
the aforementioned may NOT be compatible with this A750. Supposedly you've
had the A750 being installed on the PSTwo 75004 or 75002, as 75001 is only
distributed on Pan-American, the NTSC area.
By the way, just for your information that our modchip designed for 75002
and 75004 is now under developing and is not yet available for selling, you
have to be patient for a while.
Modchip-Spare Parts Stockist
MARS PRO 816 Reseller
PS3 Amazebreak Reseller
PS3 Slim 250GB PAL