POWER LIGHT FLASHES 3-4 TIMES AND SOUNDS LIKE TRYING TO COME ON B

WHEN I TURN THE POWER ON TO THE TV THE POWER LIGHT COMES ON FOR ABOUT 3-5 SECONDS THEN GOES OF BUT WILL DO THIS 3-4 TIMES BEFORE IT GOES OFF COMPLETELY. WHEN IT CYCLES ( AS I CALL IT ) YOU CAN HERE IT TRYING TO TURN ON.. IT HAS BEEN DOING THIS FOR A MONTH OR SO AND WOULD COME ON AFTER TWO OR THREE TIMES GOING THROUGH THIS NOW IT WILL NOT COME ON. WHEN IT WOULD COME ON THE PICTURE WAS GREAT.. PLEASE HELP. I HAD A TV REPAIRMAN WHO I CALL AND SAID IT WAS 75 JUST TO COME AND LOOK ( LESS THAN 2 MILES FROM MY HOUSE ) THEN THE COST OF REPAIRS BUT THE 75 DIDNT GO TOWARDS THE REPAIR SO HE DIDNT COME.MY TELEVISION IS AN RCA 52 '' HDTV MODEL NUMBER D52W27D.