Hi. I have a Philips 51pp9100d projection tv and the green led on the power button flashes 3 times and the tv chirps. Any ideas? Also, when looking for the LSB mainboard online, my part # shows as not a valid Philips number. The number on m y board is 313503333411. Does anybody know what the part # is for a Large System Board for this model? Thanks for any help.