lcd controller problems

Hi,

I'm having problems with my lcd controller. The main issue is with the hot end temperature control. The issue is that the set temperature is overshot everytime and fluctuates rapidly. I've autotuned with pronterface with no luck. The issue doesn't happen when I attach it to my laptop only when attached to the lcd controller. I never had this problem when I first got the item and am wondering if the lcd controller has malfunctioned. Does anyone have any insight into this? Thanks in advance for any solutions

Matt

I've figure out a solution in case anyone was wondering.... in the firmware I lowered the max current and increased the PID functional range. This worked for me. If this still isn't working I plan to turn off PIDTEMP and just use Bang Bang.