Go here .... it's a site just like what the operators use to get the codes. If you can't get it then here: Admiral Televisions 503, 505, 508, 509, 515, 526, 540, 543, 544, 548, 579, 580, 581, 582, 583, 584, 585, 586, 587, 591, 605, 606, 607, 608, 625...
I do. i am the owner of M&W electronics. I specilize in on site repair of projection televisions. I am located in Phillipsburg, NJ (about 45 min away from you) I am open 6 days a week (closed sunday) give me a call at 484 542 6428
yes many there are many companies which support this feature of PC input in the televisions the best company which stands good in this aspect is VIEWSONIC.