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Repair service for SONY KDL-37M4000 - TV dead, not powering on or clicking on and off

If your Sony KDL-37M400 is either completely dead or clicks on and then right back off without ever getting to show an image you may need its power supply board serviced or replaced

Coppell TV Repair offers a REPAIR SERVICE for the power supply board of Sony KDL-37M4000 as shown in thepicture.

REPAIR SERVICE means that you have to send us your malfunctioning board that we will repair, test and return to you.

Failure symptoms

Typical symptoms of malfunctioning in the power supply are

  1. Completely dead TV (LED at the front is dead)
  2. Front LED does not change upon power on command from either remote or main power button.
  3. TV clicks on and then right back off

Some of those may be caused by other failures as well. The indicators listed are a guidance for the likelyhood of a bad power supply board, not a guarantee for one!

Processing time

Typical processing time for the repair is within two business days; if we have any probems that require more time (be it overload or technical problems) we will contact you with an update and request for more time.

We have a fairly high success ratio, but we still do not guarantee success; if we can't get the board to work, though, you will not need to pay.


Presently we do not charge in advance for repair services.

Instead, once the board(s) are received, tested, found to be defective, serviced and tested again to success we send a payment request to the customer.

If something along the process - such as unexpected difficulty or finding a board to be functional - arises we contact the customer via email and/or phone and disscuss options.

Minimal charge / diagnostic fee

If a board arrives and is determined to be functional we charge up to $25 for diagnostic fee (usually $20).

For explanation of why do we do that please read this article.

Board requirements

We ask that the board arrives here in good physical condition and without traces of tampering. If someone (other than us, that is) has already attempted to service the board then please contact us with a description/pictures and do not directly place an order. We reserve the right to refuse service to boards that have signs of repair attempts.

If you have any questions do not hesitate to ask.