My problems begin:
some case: when I try to erase DVD/RW with Nero or other soft wares get me a error message (power calibration failed).I look for a solution in the internet, then I understand must be upgrade FW for solve it. I visit www.plextor.com for give a new FW and find "750A103.exe" file. It's a self extract executable file. So I extract it and give some files such as "PlexFirm.ini" and change Inquiry=PLEXTOR DVDR PX-750A to Inquiry=PLEXTOR DVDR PX-751A and fix "FirmwareFileSize" parameter. Finally I upgrade FW completely. I think well of PX-751 is same family product with PX-750!
My device don't work again I look for all over the internet to find out PX-751A flash file, but I cannot find any flash file for PX-751A.
My device changed to PX-750A now!!!
I contact support at "www.plextor.com.cn" too, they say:
<< I'm sorry to hear that...but as you know, this is not our official step for upgrading the firmware. The latest version firmware of 751A is still the default build-in firmware at present. We also don't have a single firmware separated from the drive. >>
So, I find out [Cross Flash] flashing method and I know can flash my device with "DW1670" firmware.
When I try to Cross Flash "PX-751A" with "DW1670" firmware, get me "The drive is not allowed to be updated." error message
I think, because my device changed to PX-750A the "DW1670_102.EXE" file get me "The drive is not allowed to be updated." error message!?
For complete Cross Flash "PX-751A" with "DW1670" firmware:
I try to modify "PX-750" flash file (103.cvt) and replace all string "PX-750" to "PX-751" with a hex editor. But when I try to reflash my device with modified PX-750 flash file, get me "Firmware Checksum Error."
also I used "Media Code Speed Edit " software, it can't help me !?
Finally >> CAN YOU GIVE ME SOLUTION FOR:
--> Fix Checksum for modified PX-750 flash file?
--> Extract firmware from "DW1670_103.EXE" file?
--> How i can find PX-750 flash file?
--> Disable device ID or device NAME at the "DW1670_103.EXE" file?
--> Disable Checksum control "PXFirm_B3.exe (Plextor Flash tool)" file?
--> Force to upgrade my device (PX-751) with modified PX-750 flash file?
--> Force to upgrade my device (PX-751) with "DW1670_103.EXE" file?
I am very helpless!