Question about Proscan 40LD45Q TV

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My proscan 40LD45Q turns on for a few seconds then shuts off

My proscan 40LD45Q turns on for a few seconds then shuts completely off no picture no sound. It will only turn back on if I unplug the power cord and then plug it back in.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 12 Answers

SOURCE: Proscan 26LA30Q-screen will not turn on

This might help you

Proscan 19LA25Q 19" LCD HDTV at Crutchfield.com Proscan 19LA25Q 19' LCD HDTV: Detailed Info, Features and Specs, and Photos. ... Instruction Manual; Product Registration Card; Limited Warranty Card ...
www.crutchfield.com/ISEO-rgbtcspd/App/Product/Item/Main.aspx?i=68319LA25Q - 46k

Posted on Apr 04, 2008

  • 2 Answers

SOURCE: TV turns off by itself & won't turn back on til unplugged, then plugged back in

Well, first your model number is the 42 inch, but I digress...

I had a similar problem with a Viewsonic 27 inch, with the blinking power light on a failed power-up. It turned out that replacing the power transformer was the ticket. However, as I have the 50 inch Panasonic plasma, I know that the transformer is built into the set itself. I'd still suggest that this is what needs replacing though, as this is different from a set being on but having no picture.

Posted on Aug 19, 2008

  • 42 Answers

SOURCE: green power light comes on for a split second, then red.

The power supply (AC adapter) is bad. It has enough power to light the red LED, but not enough to power the TV.http://shop.ebay.com/?_from=R40&_trksid=m38&_nkw=12+volt+5+amp+power+supply&_sacat=See-All-Categories

Posted on Jun 05, 2009

  • 1 Answer

SOURCE: why would our proscan big screen just turn off and

I JUST GOT HOME AN TRIED TO TURN MY JVC PLASMA TV ON. THE TV WILL NOT TURN ON. EVERYTHING ELSE HAS POWER TO INCLUDE THE TV BUT THERE IS NO PICTURE OR SOUND. BLANK SCREEN. THE BLUE POWER LIGHT IS FLASHING ON AND OFF. THE MODEL NUMBER LT-42P789

Posted on Jul 16, 2009

  • 8457 Answers

SOURCE: black picture

Ur LCD inverter board is dead.Replaced the LCD inverter board.U will get ur picture back.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter board for the replacement.It a long board in shape.

Posted on May 09, 2010

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1 Answer

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The TCON board is not junk, if anything it is the mainboard that is faulty.

Jul 04, 2016 | Proscan 40LD45Q TV

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replace the power supply board!

Mar 02, 2013 | Proscan 40LD45Q TV

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There should be some shorted component/s in the main digital board. Check and replace it. In most cases, the board might need replaced as card basis. Contact any experienced service technician.

Jan 08, 2013 | Proscan 40LD45Q TV

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When i turn proscan tv on it automatically turns off(just turn on for less than secon


OK I Have a 40" Proscan 40LD45Q
had the power problem when you turn it on it would flash and then cut off again.
after checking I found that the transistor on the power board was bad.
Its one of the 2N4401 transistors found on the cold side in between the
cluster of resistors and and mosfet heat sink. kind of hard to get too
but replaced it and tv works great now.. $1.19 at radio shack for the part.
Hope this Helps ..
By Lynn

Feb 22, 2012 | Proscan 40LD45Q TV

2 Answers

I have a proscan model 40LD45Q and it will turn on for about 1 min then turn off, when i turn it back on as soon as the picture comes up the tv will shut down. this is a cheep tv and sending it off to get...


I have two ideas, first there may be only a loosed connection and cold solder the second power supply if your unit tends to work when warm up this indicates the thermal intermittent problem like I said due to loosed connection or cold solder and the second is the bulging up or leaky capacitor if your capacitor is faulty this will cause a low and unfiltered dc output voltage it will not properly transfer dc output to other parts of your tv. But if you are familiar with electronic parts and have proper tools you can fix it by your self but if not i suggest that you should contact a technician to do it for you, it will not cost you a lot of money. Good day and best regards.

Aug 01, 2011 | Proscan 40LD45Q TV

1 Answer

After 6-8 on tv shuts off will turn back on after about i1 min


check to make sure the TV is not getting hott, and that the vent for the tv is not blocked.

Feb 15, 2011 | Proscan 40LD45Q TV

1 Answer

When I Turn Proscan TV on it automatically turns off (just turns on for less than a second)?


You may have power supply DC filter caps problem, that will be the first place to look.
If you are going to DIY and have proper tools and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com

Jul 03, 2010 | Proscan 40LD45Q TV

2 Answers

Black picture


Ur LCD inverter board is dead.Replaced the LCD inverter board.U will get ur picture back.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter board for the replacement.It a long board in shape.

May 09, 2010 | Proscan 40LD45Q TV

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