Picked up this 55 inch LG 55LF5800 . It has standby light but that's it .Blinks 3 times .No picture,no sound.Could hear rattling inside.Changed all led strips as half of the reflectors were broken.Put back together still no go .Checked output from power supply to LED connector .Only getting 89 volts on each .Suppose to be 215 V and 145 V . power board number is EAX65423801 .Yes i know screws are not on power board .I just put back on for pics.