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Re: hello again!!!! model# is FP5251 G105
There should be three circuit boards on that model a small board on the right then a larger board in the middle and another large board on the left the vertical IC will be located on the middle board it will be attached to a aluminum heat sink.
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Thats usually an issue with the vertical output IC which will prevent the picture tubes from lighting and the set will throw the error code for berticla protection. Replacing the vertical out IC should solve the issue in most cases. Your model uses the TDA8177 its at IC4B01 board location shown belo. and you can get one at the following link http://tvrepairworld.com/vertical_output_ics The illustration below shows where its at indicated by the red rectangle
I am not familiar with this particular set, but it sounds like you have no vertical deflection, which would mean your vertical output IC may be bad. The # on those ICs usually start with LA and is mounted to a heatsink.
Thats the PTV711 chassis phillips magnavox. I would suspect the vertical output IC needs to be resolderd. Its located on a aluminum heatsink and should have vertical stamped on the board near where the IC is located. Often when the vertical drops out it causes the CRTs not to light as a safety feature to protect the tubes. let me know if you need more assistance.
try resoldering the vertical output IC thats most likely the problem if not the vertical output IC may need replacing. If you can solder you may be able to do this yourself as its not a hard repair the replace the output IC