I ahve an av48wp30 tv the convergence went out on it so I removed the board and had the chips replaced when I put the board back in the tv will power on but it just sounds kinds like a heart beat for about 15 to 20 seconds and then trips out no picture or sound I checked all connections and made sure nothing was crimped any ideas what it might be now. Tv was playing before the chips were replaced. just had a red swag at top. thank you.

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