Top 20 Proscan 42LA45H 42 in. LCD TV - Page 4 Questions & Answers

the problem on your remote i think,, infrared is defective you can testing that by using digital camera place on the top view in the front of infrared of remote when you press any button on remote the infrared should lights on to the camera if not your infrared is defective you need to replace that or you can buy a new one

if this solution helps you please rate it thank you

Proscan 42LA45H... | 156 views | 1 helpful votes

I believe it's fixable! Take a look on your video and audio cables (behind the TV, the red, yellow and white ones). They must have a problem. Already happened to me!
I hope I've helped...

Proscan 42LA45H... | 258 views | 0 helpful votes

What part is it, that you have already replaced? Please clarify this info so that I can tell you what you can do to resolve the problem.


Proscan 42LA45H... | 784 views | 2 helpful votes

Sounds like a failed or at least failing power supply / power board inside the TV. Unfortunately this is a very difficult repair, and unless you are an electrician I would not recommend attempting it. You will want to contact a local TV repair person in your area if you are sure this is out of warranty, more on that in a bit here. This is actually the most common problem with this type of TV, I see it every day, it just happens - sometimes with new TVs and sometimes it takes many years for it to happen.

If you think it may still be under warranty please contact the manufacturer to file an RMA. If you happened to purchase the TV with a major credit card (not a debit card) there is a good chance it may still be under the free extended warranty most credit cards place on electronics. Please contact your credit card company to inquire if they do this, and they will be able to file the claim and get you a refund for the TV.

If you want to attempt the repair yourself please let me know and I will get you the part number and a place you can purchase it from for what you need.

So sorry that I don't have better news but it is definitely a power issue internally.


Proscan 42LA45H... | 558 views | 1 helpful votes

some tv's have an option for the signal in the antenna try that in your video setting my man hopefully thats a simple solution to a simple problem the lack of the yellow video input has me head scratching as it odd they didnt provide one ????? strange indeed good luck my friend

Proscan 42LA45H... | 241 views | 0 helpful votes

Simple test to check if the problem is in the remote or the tv: take your phone and your remote to a dark room, activate its camera then point the remote at it and press a button and keep it pressed. If the remote is good then the screen will be lit up and the light will be pulsating. In that case the connector for the remote sensor inside the tv got dislodged when you have moved the tv - just open the back of the tv and reseat it.

Proscan 42LA45H... | 42 views | 0 helpful votes


Unplug the unit for few minutes, say 30 minutes, and then turn it ON. If the problem persists, this is am internal failure and needs repair.It could be an issue with power supply board, vertical circuit , horizontal circuit and many more. If you have electronics repair experience, would be able to read schematics and use multimeter/ soldering iron, could keep all the precautions - revert and i would be glad to provide you few pointers.

Let me know,so that we could proceed.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Proscan 42LA45H... | 161 views | 0 helpful votes

Go into the menu to see if the closed captioning systen is in the "off" mode

Proscan 42LA45H... | 55 views | 0 helpful votes

First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:

Failed TV and Monitors:

Capacitors kit: he can make you a set of caps.

Proscan 42LA45H... | 188 views | 0 helpful votes

just look at the owners manual of how to adjust the picture

Proscan 42LA45H... | 925 views | 0 helpful votes

Check whether you have switched OFF screen. Some T V have this feature.
Check Brightness & Contrast levels in the MENU mode through remote control.

If EHT is not produced picture will not be present.

Proscan 42LA45H... | 144 views | 0 helpful votes

Please leave your set ON for several hours and see if the circuit stabilises.It is possible that some capacitor has weaked with electrolytics drying up resulting in loss of value.
If there is no result then open set and try to look for components visibily faulty like high value filter capacitors. replace if suspected.
Use a good soldering iron to touch up soldering the main board, specially the mP sections, the display drives.
Plug/replug in all connectors after checking in the main board/powersupply/display section.
Use a multimeter to check the failed voltage and trace logically the cut off line voltage.
I hope you work on this tip.

Proscan 42LA45H... | 47 views | 0 helpful votes

Rule of thumb, if you can keep your hand on it, despite it feeling hot, then there is no danger of fire. Flat TV's use a lot of power for the ventilation slots available and so appear to be hotter than you would expect. 40"+ screens use about 150 to 200W the same as two old-style bright light bulbs - it's going to give off heat.

Proscan 42LA45H... | 71 views | 0 helpful votes

Most TV uses Metric M5 or M6. You should be able to get them locally for about 25 cents each so you you try them out.

Proscan 42LA45H... | 218 views | 0 helpful votes

Unplug the TV for a minute and then plug it back in to cause a reboot. After the TV restarts, access the TV menu and re-scan for channels.

Hope this helps!

Proscan 42LA45H... | 97 views | 0 helpful votes

Check to see if you are on wide zoom mode in that input and check the definition. Go to your menu screen and check your video menu. There are different options for viewing. My inlaws prfer the words cut off it drives me crazy. Hope that helps

Proscan 42LA45H... | 311 views | 0 helpful votes

with no picture and no audio i would more than likely suspect the main AV Board needs replacing.
Take the back of your tv and get the part number of the AV board ( THE ONE WITH THE INPUTS AND SCART SOCKETS) then Google or Ebay for a replacement.
95% thisd will cure your problem.
Hope this helps

Proscan 42LA45H... | 444 views | 3 helpful votes

This would be the decoder/tuner board giving out, Your going to need to take it in for a replacment of that board.

you can try to unplug it for a while and see if it resets but i doubt that will cure anything long term. Proscan is known for this issue and have been known to have bad decoders in them.

Thanks for being considerate and leaving a ratings and feedback today.

Btw, I’m available to help over the phone in case u need at

Proscan 42LA45H... | 92 views | 0 helpful votes

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