Help for Lg f350K . not detecting with pc . no download . no recovery

I was flashing Lg f350K with ocutpus box .during flashing pc hang . then now mobile restarting on logo . not detecting with pc . no download mode no recovery and no fastboot mode . i collect all files for unbrick . but i did not find force Qusbdload test points .. can any expert help me please about force test points

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