I have a pn51e550 plasma TV that will not show picture. I do not have the remote.

1. When plugging power in the logic board does 1 quick flash and 1 long flash 5 times. The front red LED stays on for 3-4 seconds then quick flashes during this time.
2. After that cycle of initialization of power the front red LED then proceeds to continuously blink 2 times fast for 5 cycles then pauses.

I have replaced the main power supply board which did not fix anything.
Anyone have the service manual for PN51E550D1F or any suggestions to determine what the cause...

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I went to school for electronics and used to be in to it but then switched to computers only. Now getting back into the electronics world because I miss it.