wont recognize all external hard drives

I have 3 WD external hard drives daisy chained together and they were all working fine until my computer crashed and was disconnected. Now it wont recognize number 1 external hard drive but # 2 & #3 hard drives are recognized, i then disconnected them all and reconnected them and now #1 & #2 are recognized but number 3 isn't and the strange thing is when # 3 was working #2's light was off but it worked, now after the reconnection # 1 is working but it's light is off. So they all seem to work but not all together like it was