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Preamp cutting out on left side

My Manley Jumbo Shrimp pre amp is cutting in & out on the left side only . Opened up to look for cold solder joint , don't see anything obvious ....poked all the joints with wood stick...seems to cut in & out when I mess with the middle circuit board and the back plate of the box? Any ideas ? 
128x128tommypenngotti
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ebm
9,311 posts
 
Fix it  asap.
tommypenngotti's avatar
tommypenngotti OP
217 posts
 
Yes it follows the interconnects …i reseated all tubes and it seems to not acting up , but I would guess just a matter of time 🤷🏻‍♂️ Thanks guys 
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fsonicsmith's avatar
fsonicsmith
931 posts
 
Not sure why you are in this forum but oh well, you are far from the only one. It could be your balance control. They get dirty and the contacts stop working. Try to gain access from the inside (power everything off and unplug first) and use a swab with high grade 99% isopropyl. While you are at it hit the input switch contacts in similar fashion. Chances are 25% or so that this is your problem. 
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