Thank you for letting me know all the troubleshooting steps you have tried with this motherboard and let me say that you have done a very good job.
Please note that Intel® 8 series boards do not support the Haswell refresh processors. Third party boards may support these processors but with a BIOS update.
Here you Can find the compatible processors for this motherboard:
thank you kevin for your generous help
i5-4440 3.10 ghz did the job ... you know , i was in a hurry so replaced it with an asus 81 ... because the customer was in a hurry ..
we'll stay in touch ..
You are Welcome!