for? I have a volt meter. There are no obvious signs of burn marks or broken parts. Previously I checked for power on the external connectors. I put one lead on the power and one on the ground and I got 14volts. I put one on the ground and one on the remote turn on lead and got 13 volts. Fuses are all good and I put all new ones in just for shits and giggles. On the circuit board where is an obvious place to check for resistance? I know little about circuit boards. Where are the vulnerable areas? I'm looking at the circuit board and it looks fine, I don't know what to check. Any other thoughts?