My son has a Radio Shack 4 in one remote (Stars and stripes possibly 15-2126 model). He recently acquired an Apex tv model PF2425. I have had some luck with input code numbers 0156 and 0767 but the tv/video button (as well as others) won't work using either of these codes. Is there a another code I can try or will he need a new remote? Thanks for your help.