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Hi and welcome to JustAnswer,
Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, bear with us; re-confirm and post back with the complete model number of the Jensen radio.
Is this a fresh/new install? ...or has it been in use for some time and this issue just recent?
Based on your other/duplicate postings, it would appear that the issue is with a Jensen VR187.
Proposed preliminary checks (if have not been done):
All others would be internal to the Jensen.