40h3e

I've got a hisense 40h3e that blinks 8 times everytime I turn it on. I get no picture or sound. At first I got 7 blinks, but then I replaced the power board and now it blinks 8 times. Specifically, it does one long blink, then 7 short. I'm at a loss here, any ideas on how I can fix this thing!?