Subscribe to newsletters

Repair kit for Panasonic TH-42PX75U / TH42PX75U bad power supply board causing dead TV, not turning on

If your Panasonic TH-42PX75U does not want to power on there is a good chance it may need this repair kit. Read listing for details!

Out of stock

( alternatives are available – see below )

This board is out of stock, but the following options are available:

Coppell TV Repair offers you a repair kit for a common problem developed in Panasonic TH-42PX75U power supply board TNPA4221 and causing a dead set not willing to power on.

CTVR nomenclature


Failure symptoms

Dead tv, no front LED, no blinking lights. Q406 on power supply board is usually shorted, F401 and/or F402 blown open.

Difficulty level

Basic to intermediate soldering skills level and consumer electronics grade soldering iron required to perform the repairs.

Kit tested by Coppell TV Repair


Repair service offerred

Local customers are welcome to have the components in the kit replaced for a minimal charge of $10.

Remote full-blown repair service of the power supply board is not offerred at time of publishing this listingt, but the situation can change at any tome.


1) As with all power supply boards please exercise caution and allow the board 5-10 minutes after disconnecting from power before starting to work on it!

2) When using a substitute for Q406 it will come with scratched identification on the corpus; we do that to prevent competitors (often without repair experience whatsoever) to copy what we come up with after investing time and money in actual repairs.

3) As with all repairs please note that we can never guarantee that this kit is all that is needed to fix the TV. It is offerred based on experience and technical information available to Coppell TV Repair at the time of the listing. For details please see the warranty conditions section below.