Sharp GF-555 crackling at power on

ACCE55

New Member
Sep 30, 2022
4
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1
romania
Hi everybody. My Sharp has some loud noises at power on. The noises are jerky.
If I hit him few times with my hand the noises stop and everything becomes normal.
I understand that there is a faulty contact somewhere in the circuit. On which board should I check?
Thank you in advance.