Question about Proscan 40LD45Q TV

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40LD45Q turns on then off

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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.

Posted on Jan 08, 2013

  • John McCauley Jan 11, 2013

    Thanks for your opinion but I don't think that, that is the problem. My DC voltages are low. I don't have any burn marks anyplace on any component. Caps look fine, but might be leaking, A few resistors aren't reading correctly.



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2 Answers

PROSCAN 40LD45Q tv will not turn on

replace the power supply board!

Mar 02, 2013 | Proscan 40LD45Q TV

2 Answers

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

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

I have a ts-w60 powered subwoofer, A sx-c605, and 2 sx-na502 speaker system, all Aiwa product. My question is, if you could draw a basic diagram how to connect to my PROSCAN lcd tv model 40ld45q. thank...

Since they're all passive speakers requiring amplification, you don't connect them directly to that TV.

It only has digital audio out and earphone analog audio. No amps or direct speaker connnections.

You might want to look at the manual for things like diagrams.

Mar 22, 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:


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, 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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