TV won't power up

We had a storm and my tv died. No power - no standby light… I tested the power board and determined it was bad. I replaced the power board. When I plugged it back in, I get a red blinking light (8 blinks). I tried following trouble-shooting for the limited info I could find to no avail. I then found something about holding the power button in as you plug it back in. That worked insomuch as I got a dark blue screen. There was no logo nor anything else though and it turned itself off after 30-60 seconds. I tested the new power board, as well as the power cord and both seem to be working fine. Any suggestions?