Question about Coby TFTV4025 40" LCD TV 1920x1080, 60 Hz, HDTV

1 Answer

Coby 40" shuts off?

The tv will work for hours, and than either shut off the video, or the audio and keep the video, or go to stand-by/blue screen. Upon shutting the TV off, and than turning it back on, it works for hours before the problem returns?

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  • Coby Master
  • 74,383 Answers

Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Posted on Nov 16, 2014

Testimonial: "This gibberish is redundant. Replacing the PCB is common sense....and, has already been done. There is absolutely no need for a TV repairman anymore. Parts are modular, require a screwdriver to replace, and are cheap on eBay...in this case, the PCB was $20, shipped. Please spare us all that rhetoric,and simply offer simple suggestions like, replace this, or this. Also, the links provided went nowhere....and your English is terrible."

  • The Knight
    The Knight Nov 17, 2014

    My English might be terrible, because, my mother tongue is entirely different to that of English. You can't even speak a word with my language. Mind it always. You've the screw driver. You know to screw a PWB to your cheap Chinese set. Do it again and again. Wish you all success. I'm totally ignorant in this field. I do admit it. Good bye.

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Posted on Jan 02, 2017

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  • 12 Answers

SOURCE: my coby tv has a

This is usually due to the tv's power supply shutting it down to prevent further damage. It does this when one of the other boards in the set is drawing more power than it should, indicating a faulty part on the board. This needs an experienced engineer to diagnose and repair it, and as this is a common fault with flat screens of all types, should not be too expensive, depending on the price and availability of spare parts.

Posted on Jan 13, 2011

  • 8457 Answers

SOURCE: My Coby tv's VIDEO turns off after a few minutes

Ur backlight IC inverter board is dead.Tries disconnectors & reconnectors the connections to the board see if it work?

Posted on Sep 03, 2009

  • 95 Answers

SOURCE: Lost TV remote for Coby Flat Panel TV, 17inch

Universal remotes are not compatible with any Coby TV. You can get a remote directly from Coby:

Send:

$6 Money Order - 'Made out to Coby Electronics'
note with your name, address, phone#, model# and what part you need

Send to:

Coby Electronics
Att: Customer Service
56-65 Rust St
Maspeth, NY 11378

Posted on Aug 23, 2008

SOURCE: My Coby 40 inch HDTV wont turn on. The blue light

I had a 32" Coby that did the same thing, turned out to be a defective main board. The main board wasn't sending the 3.3v signal to wake up the power supply. In my case I sold the tv for parts because it wasn't cost effective to replace the main board. It sound like your main board

Posted on Apr 11, 2012

SD Tech
  • 14553 Answers

SOURCE: My coby tftv3229 wont turn on and I've only had it

If its two weeks old why are you here? Take it back to point of purchase and either have it fixed or replaced or get a refund.....

From the brand you likely are in UK but here all sets come with some kind of warranty==the problem sounds like a power supply issue but if you have a warranty and open the set it will void that warranty.

Posted on Apr 11, 2012

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http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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