Pn60f5300afxza wont come on.

I have a 60” samsung plasma pn60f5300afxza. It started taking several tries to come on, got worse and has now quit coming on completely. I opened it up and checked power supply voltage. The vs and va voltages drop rapidly when power is turned on. Through process on elimination i found 2 connections that when disconnected from the main board; the vs and va voltages remain steady at 228 and 57 respectively. One is the white ribbon connector going to the ymain board. The 2nd is the 14 pin wire connector going to the x main board. Even with the xmain disconnected from the ymain, it still causes rapid loss of voltages. Do i have multiple problems or is this just a faulty main board or something else? Thanks in advance.