So I guess I'll have to wait for the chip programmer to get this over with.
Thank you sir for your help and I'll keep you posted with the result.

@Adel - You're welcome, and sorry, yes to fix this you need programmer unless you do pinmod and reflash with unlocked FD (Or have service/ME/FD/FDO jumper on the board)

@Lost_N_BIOS pinmod with my Alienware 17 R3 is nearly impossible since I can not start the mobo while doing the pinmod.
There are no jumpers on the motherboard either. That's why @Mofoist and I both had to do the hardware flashing job instead.

Yeah, today, I have received the ch341A programmer and the SOIC8 test clip, reprogrammed the BIOS chip as you instructed and my mobo is back to normal with valid ME there.

Finally, after more than a year waiting desperately for Dell to come up with a solution other than changing the motherboard.

Thank you very much. I wouldn't be able to fix it without your help.

@Adel - Have someone else start board while you do the pinmod, ohh you got it! Great you were able to finally fix with programmer!

You're welcome, if you ever need other advice let us know!