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I have a proscan 40LD45Q. It is a1 week old and when I turned it off the other day, it will not turn back on. The blue light will come on for a few seconds, then turn back to red. Then it will have no response. I unplug it and it will do the same when I power it up again. After it turns red, there is no response whatsoever, until I unplug and plug it back in again.

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Take it back to where you bought it
It has a faulty circuit board

Posted on Aug 26, 2010

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2 Answers

PROSCAN 40LD45Q tv will not turn on

replace the power supply board!

Mar 02, 2013 | Proscan 40LD45Q TV

1 Answer


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

My Proscan 40LD45Q powers on then flashes and turns off.The power light goes out but comes back on after I unseat the power and replace the cord. I have replaced the caps on the power supply and also...


It's the problem of overheating in the power supply board of the TV.on the power supply board of the TV there are few capacitors and IC.any of this ic is got short or may be due to this when you start the TV the current passes from electric outlet to the power supply board of TV.but when the current passes from that weak/faulty part at that time current gets stopped or slow and the board overheats and TV shuts off. this is a common problem faced by many other users too.the possible option to solve this issue is to check the power supply board by a meter and continuity tester and replace the faulty component on the board which is short due to which power supply board is getting overheated.its bit technical job but yes its not at all a costly repair to do or get it done by the technician. for required parts it can be easily available from local electronic hardware shop.
Do take care in solving the problem of the television....

Jun 28, 2011 | Proscan 40LD45Q TV

2 Answers

I have a Proscan 40 inch 1080P LCDTV (40LD45Q), but when I connect my computer to it, (GTX 260) with DVI-HDMI cable, it says the native resolution is 1366x768. Is Proscan lying that this TV is 1080P?

You can attempt to force 1080p to the TV by unchecking the box "hide modes this monitor cannot display" in the display adapter propteries, then try to select 1920 by 1080p, 60hz, 32 bit color, and see what happens. Post back what your findings are.

May 03, 2011 | Proscan 40LD45Q TV

1 Answer

Tvs not even a yr old won turn on , when it does its for a few secs n back off ! bought it from a company called A & E factory online n they were suppose to have a tech out twice now n re sch the...

Take it to a local repair shop and have fixed and send A & E the bill. Or have local repair shop get authorization from A & E to repair it for you.

Jan 06, 2011 | 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, 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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