OK my new chassis came in. I transfered my booster pcb to the new chassis and i've got a slight problem. It was workin fine till i closed the pcb. now i get this really high pitched whine like every 10 seconds. reminds me of a capacitor discharging or somthing. sounds like when you have a flash camera charge up.
Anyway i resoldered the ground (black wire) and it started working again and again i close the pcb and it does it again. How to fix?
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