Turned yellow and stopped growing HELP

i have aurora indica. 4 weeks in flower. hps 1000. mg soil and bloom from mg. plants have stopped growing and turned 70% yellow. i did a flush and got new nutes from hydro store.. 1 dies and the other 2 have no growth altho they are still alive. any advice plz. my first grow was flawless with the exact same set-up?? the first grow was bagseed.

Damn.... You may have the lights too close. Check the temps. I feel your pain. I use a 1000 watter myself and this grow i fired up 2 1000 watters and my plants are not doing well. 2 lights 2x the weed. Wrong looks like i may get less weed now with 2 lights.

here is a pic. it actually looks totally dead today!!