Owner manual please help me fine a owner manual for my RCA 52 inch model p52936 help.

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
http://electro-medical.blogspot.com/
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my tv wont turn on at all and it worked fine this morning can anyone help its a rca floor model 52 inch

internal / external selector switch on back of tv near inputs or setting in menu under settings or sound labeled - internal amplifier/ external amplifier.

Try www.partstore.com, they have a pretty good rep for parts.
When you get on site you will have to give make, model and possible part number.
Just follow instructions..

where are yo located

set it up

IF THIS IS A PROJECTION TV ,,THE CENTER LAMP IS ACUALLY THE GREEN PICTURE TUBE-ANY LOCAL TV SERVICE COMPANY WOULD LOVE TO SELL YOU A GOOD USED PART- ..RCA IS NO LONGER --GO TO THE" THOMSON ELECTRONICS" WEBSITE FOR CUSTOMER SERVICE,,GOOD LUCK!!!!

That owners manual is available here for a free download. Good luck
http://www.thomsonnetwork.com/EN/Public/InstructionBook/IBSearchResults?querytext=P52936*&brands=RCA%2cGE%2cPROSCAN%2cRECOTON%2cSPIKEMASTER%2cAR%2cJENSEN%2cAMBICO%2cADVENT%2cUNBRANDED&doctypes=IB&categories=ACCESSORIES%2cAUDIO%2cCOMMUNICATION%2cDTVS%2cDVD%2cMULTIMEDIA%2cCOLOR_TV%2cVIDEO&firstdocnum=1

Bad high voltage transformer. Most original transformers are not made anymore by RCA.

The P52926 uses the PTK195 series chassis. The middle "rear projector" is actually the Green Picture Tube. If the red and blue tubes are working then all major components of the set are fine. The only things I can think of that would stop the green tube are cracked solder joints on the green picture tube socket PC board or an open high value (100k - 120k ohm) resistor on that board. If you do not have experience testing and replacing small parts or resoldering boards in a projection set then have a qualified tech handle it for you.