Panasonic TH58PX60U TV comes on for 5 to 15 minuets and shuts down with 4 red flashes on trouble code light. Is this the power supply board?

Provably but neccessarily. It would be hard to explain if you don't have any technical. below is a panasonic blinking code that might help you. It is not always accurate. You would have to check the voltages of your power supply to be sure. You can find parts for this TV at. www.interliquidparts.com


Note blink charts can be different depending on the model and the year of the T.V.

1 - blink STV 5v sense DG Board

2 - blinks 15v SOS D Board

3 - blinks 3.3v SOS D Board

4 - blinks Power SOS P Board

5 - blinks 5v SOS D Board

6 - blinks Driver SOS 1 SU / SD / SC Boards (SC energy recovery circuit)

7 - blinks Driver SOS 2 SU / SD / SS Boards (SC floating voltage area)

8 - blinks Driver SOS 3 SS Board (SS energy recovery circuit)

9 - blinks Panel Config. SOS

10 - blinks Sub 5v SOS / Main 3v SOS DG Board DTV 9v SOS / Tuner Power SOS

11 - blinks Fan SOS PB Board

12 - blinks Sound SOS H Board

13 - blinks Communication error DG Board with IC8001 (Pesks Lite 2)

4 blinks Power SOS P Board
Try opening it first look for some bad connections or so if they are none use a hair drier and heat the board looking for the place that creates the 4 blinking then use the hair drier on cool to cool the place and get this time little longer.