hifi engine

need your help in Sony FH-B500

Dear all
I have a Sony FH-B500 (HCD-H51), stopped working, not responding by pressing any switch, only can be operated through remote control, need your help.



Re: need your help in Sony FH-B500

It's also possible that a shorted or stuck switch can cause the same problem, as the complete keyswitch circuitry is usually scanned for closures. A stuck key stops the microprocessor from recognizing keypresses.

Re: need your help in Sony FH-B500

A poor connection or open trace on the switch keypad can cause a malfunction.