Like with most modern electronics you may find it less expensive to replace the radio than to fix it.

China is sending more disposable radios every week.

They have a very good business plan. Send cheap electronics that you will replace every two years. Warrent them from China so that you will spend more to ship it back than you paid for it.

Put different brand names on them so that you do not realize you are buying the same cheap crappyola each time. Then buy another one and another one and so on.