Called out on a service call to look at a S250 where it had no lift or tilt. Customer always uses the foot controls but I switched to hand controls just to try it. First I noticed the red lock light was lit and the orange light was on in the upper left at the temp gauge. Switching to the hand controls and pushing the unlock button, the lights went out and everything worked. Switching back to foot controls, no lift or tilt again and the lights come on again. Any ideas what could be going on?