I have an iPac4 from 2003 that has developed an issue. Many of the keys are not functioning at all and others are erratic in their function. I have tracked this down to an issue with the PS/2 OUTPUT port. Is there some warranty or something on this unit that can be applied towards a repair/replacement? I see that the iPac4 is currently $65USD + $15 shipping via DLH and as a loyal customer of many years would love to hear that there's something that can be done.