Hello. I've got a Philips DVP520 DVD player which works fine except that the machine's IR sensor will not respond to the remote even though I have renewed the batteries therein. I note that the IR sensor on the front of the machine is not lit up. (I can't recall whether this sensor was illuminated before I had this problem and I can't find anything in the user manual which states that the sensor should be lit up.) So assuming that the sensor should be lit up is there any economically viable (given the unit's age) repair which is available? Thanks.