Proscan 42LA45H 42 in. LCD TV Logo
Posted on Jan 26, 2014
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Its stays on sold red when powered on . when i remove the invertes cable that connect to the power supply it turns green then i can power it on to blue ! but when i plug the invert cables back it stay red again help .. the tv will not show a picture nothing

1 Answer

The Knight

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  • Proscan Master 76,851 Answers
  • Posted on Jan 26, 2014
The Knight
Proscan Master
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With a flat screen TV, this is a bad symptom indeed. If you wish to get some details, check the site linked here. Surf the site in "MOSAIC" view. It will make surf easy. Surf the site with patience.
http://electronicshelponline.blogspot.com/
Screen shots to defective flat screen TV are given. You can compare it to your TVs' screen and can make sure about the fault.

Testimonial: "40 years this the best you can do :) what a joke !!"

3 Related Answers

Jonny Pridgen

  • 42 Answers
  • Posted on May 10, 2009

SOURCE: Proscan LCD TV 19LA25Q stopped. Green ON light won't stay lit.

http://shop.ebay.com/?_from=R40&_trksid=m38&_nkw=12+volt+5+amp+power+supply&_sacat=See-All-Categories

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etaskinen

  • 4 Answers
  • Posted on Jan 16, 2010

SOURCE: why cant i get my tv to turn on ?

just worked on one of these, same problem, found a bad capacitor,1000uf 25volt, in power supply module.

maatmartin7

matt martin

  • 1259 Answers
  • Posted on Jul 04, 2010

SOURCE: Red lights is on and when I go to turn on the TV

Your external power supply is the culprit. The small box that is connected the outlet plug is bad. The TV itself is fine! The external box has a bad capacitor inside. You will find a 16 volt 1000MF capacitor at 105 degrees that is bad and next to that one is a 25 volt 1000MF at 105 degrees, replace as well! Show this info to your TV tech or hobbiest and repairs will be at hand. Thanks for asking and good luck!

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1answer

When I turn on the TV the green light goes green to red to green to red. If I keep turning it on and off eventually I get a picture. The picture is very dark at first

Sounds like back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced.
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Sylvania lc320sl1

in this television .if you see the digital television .its the inverter board. try a probe pull off the small cable of inverter board .and try to turn on the tv .if the light stay green the inverter is out. thanks
2helpful
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How to determine the plus and minus wires

You may check it with DC voltmeter. With voltmeter, red cable is plus, black cable is minus. Connect it wit the inverter.If your voltmeter is measuring positive, it mean the polarity is true, this is mean cable of inverter that connect with red cable of is plus, and with black cable is minus. If voltmeter measuring negative, try to flip the connection to measuring postive.
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I have two monitors. One Samsung SyncMaster 2233 an one Samsung SyncMaster 2243. My problem is that the SyncMaster 2233 for some reason is totally black. I'm usually not terrible with these things, but my...

hello Gabriel

Could you check your SyncMaster 2233 for me and tell me your findings. If this monitor is connected from your computer and when both switch on, did the led indication lamp from your monitor lit steady green? or this lead indication lamp lit green then turns red?

1. If the led indication lamp lit steady green then there is nothing wrong with the settings, configurations, driver or hardware on your computer. The problem would be the backlight inverter lamp in your monitor is busted. Or it could be the inverter board that supplies high voltage for the backlight inverter lamp that is bad. You can replace the backlight inverter lamp located at the upper and lower part of the monitor with a replacement part you can purchase at shoppejimmy.com. Inverter board repair can be risky if you don't have the skill. Even opening the back cover of your monitor and replace by yourself the inverter lamp is risky too, could inflict more damage. you can bring it to a local professional service man.

2. If the led indication lamp lit green then turns red, then if not the video card the power supply section from your monitor is bad, you can replace polarized capacitor with same value. Just inspect and those with blown or leaking capacitor. You can also check the terminals and solder joints for the 15-pin vga terminal connector where vga cable is connected on your monitor. Resolder the terminals.

3. If the red indication lamp did not lit at all. Power supply section in the monitor is bad. You can check the output voltage from the power supply section. +5VDC is supplied for the main board and +24VDC is for the inverter board. Replace leaking or blown capacitor with same value.

Just remember, this should be done when computer and monitor is turn off
Post back if you have more questions. I am willing to give you assistance.
5helpful
3answers

Why cant i get my tv to turn on ?

just worked on one of these, same problem, found a bad capacitor,1000uf 25volt, in power supply module.
0helpful
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No led red or green vec550pob 1500 watt, nor do i know what the "power supply accessory socket"

how to repair power maxx inverter 1500 wats vec550pob

my inverter turns on but red and green light on at the same time, and fans working for 3 seconds on and off
0helpful
1answer

Monitor goes black but the green light stays on. I turn the power button off and then back on and it comes back on. It may stay on for a few seconds to several minutes.

Check to see if the image is Dimmed. Chances are the power supply on the FPD is either dead or not supplying power to the back lights.

Your problem is the back lights are not being powered. There is a signal going to your FPD because the power light remains on green, but the back lights are what helps support an image from the Front Panel Display.
The only way to fix this is to open it up.

If its got 3 boards inside((logic-->video, Inverter, Power)) The problem is the Inverter. Replace it.
The inverter is the board that supplies power for the backlights to turn on. The backlights
provide a light.for the LCD Panel(provides color and is the logic. ... similar to a projector.
If its got 2 boards inside ((Logic-->video, Power)) The problem is the power supply. The inverter is embedded onto it.

Simply replace the part with a known good one, and you got a spanking new monitor.
0helpful
1answer

Screen going black, green LED staying on

Check to see if the image is Dimmed. Chances are the power supply on the FPD is either dead or not supplying power to the back lights.
Your problem is the power supply or the inverter on your board, you can replace it and it will be fixed.
Easy Fix REALLY EASY FIX
(inverter is what supplies power to your backlights. A lot of the times the reason a monitor goes black and the green power button is on, is because the backlights shut off. in most designs of the 1730 the inverter is embedded on the power supply. That is most often the case on this problem. Power supply/Inverter=Replace it and you will have a spanking new looking nice monitor working again. :)
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Standby LED stays red.

This can be a combination of things. The main power supply may have failed, or there is a short putting it in to protect mode. It is also possible that the back plane supply and or lamps have failed.

Jerry G.
1helpful
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Phillip tv

Probably bad inverter board. It has a short in inverter board and as soon as it powers up it detects the excessive current draw and shuts the set back off. Open it up, unplug the power supply connections to the inverter board then try to turn it on, if you get a green light then the inverter is bad. Try E-bay for replacement board.
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