Need help for bricked oneplus two

Hi,

I had updated my oneplus two with cyanogenmod 13 successfully. I had been running this for more than 5 months.
Yesterday i had downloaded an update of CM13 and was trying to install the update, the phone just went blank with a black screen so i restarted the phone. Since then the phone is not loading into the OS, when i try restarting the phone the oneplus logo screen just flashes and then the phone just displays black screen or switches off.

I am not able to enter into recovery mode which is the biggest problem i am facing due to which i am not able to even perform other recovery options.

I connect the phone to computer using usb and when i use any command such as adb devices, i dont see any device in the list. i get error: no devices when i use other adb commands.

I tried using QFIL from quallcom, but i get the below error when i click the download button:
Process Index:0
Programmer Path:E:\8675_W00\prog_emmc_firehose_8936.mbn
Image Search Path:E:\8675_W00
Please select the XML file
Invalid image search path, ignored
Start Download
Program Path:E:\8675_W00\prog_emmc_firehose_8936.mbn
COM Port number:11
Sahara Connecting ...
Sahara Version:0
Start Sending Programmer
Download Fail:System.Exception: Unable to download Flash Programmer using Sahara Protocol

at QC.QMSLPhone.Phone.QPHONEMS_SaharaArmPrgDownload(S tring sFileName)

at QC.SwDownloadDLL.SwDownload.QPHONEMSSaharaDownload ArmPrg(UInt64& version, String armPrgPath)
Download Fail:Sahara FailSahara Fail
Finish Download

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Please help me in unbricking the oneplus two.

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