1 WDMarwel is a tool, it does not fix firmware by himself, it gives you an ability to work with firmware
2 Each HDD have unique modules in firmware, you can not write it from another HDD
Not, not provide
3 You need write ROM from original pcb to new pcb, it is also unique for each HDD
Considering your questions, you will not be able to repair this hard drive
Contact to specialists
1. I know WDMarvel is a tool. I have tried other tools, none of them can write wd element WD20NMVW - 11AV3S4, they can only read/write module on old WD HDDS. That's why I am turning to WD Marvel. I know PC3000 can do the job, but $$$$
2. I know I got to find the right firmware. If WD Marvel doesn't provide Firmware, I just need to get/buy it somewhere else.
3. I have already taken the serial flash chip(rom) off the original pcb and soldered on the sata pcb one week ago.
Now back to my question. Does WD Marvel cover my WD HDD? Is any technical doc about how many WD HDDS( family) are supported.