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How can i trouble shoot polaroid 42 flat screen sound but no picture

I was told about 4 switches in the back, but cannot find this newer model

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 71 Answers

SOURCE: sanyo 42" flat screen tv green light comes on but no picture

oops u r in trouble.

Posted on Mar 05, 2009

  • 8457 Answers

SOURCE: No sound on my Polaroid flat screen

Unplug,replug the tv about an hour later.Go in ur tv menu.Go to AUDIO,go down to reset it,well go back to factory setting.Ur sound should return.Not,than ur Tuner board is dead.Trires websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board for the replacenent.

Posted on May 04, 2010

rulds2008
  • 3866 Answers

SOURCE: We have a works 42" Polaroid with sound but no picture

The common issue with polariod is there power supplies, Your going to have to fork out something for the repair if you not willing to buy a new TV here, A new board in this would be $175 labor another $80 or $90 tops. So you getting into $250 fast. This is why I say to all my askers NEXT TIME buy a extended warranty. This will need a new power board sorry to break it to you and its the common issue I am seeing on fixya.com from my premium chat customers. Please do be considerate as this information was free to leave postive feedback and maybe a ranting or two.. for all those expert involved in your case today.

Posted on May 29, 2010

budmrtn
  • 11361 Answers

SOURCE: My Polaroid Flat screen has no picture, but still

No picture can be caused by dead T-CON board, main board, 24vdc power supply not supplying power to the backlights inverter board, bad backlights inverter board. So inspect for bad caps fisrt and also try the instruction below.
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:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.

Posted on Mar 18, 2011

  • 184 Answers

SOURCE: no power light,no sound no

Hello,

It could be just a few bad capacitors on the Power Supply, there could be a bad capacitor on the Y board if its bad it needs to be replaced with the buffers together
If you want to attempt the repair yourself you can do a visual of the power board caps will appear swollen on top.
but if otherwise, There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc. Look for 5vdc, 12vdc, and 24dvc.
This will require you having basic knowledge in electronics repairs and do take care in handling the power supply of the television..

I hope that will help

Posted on Aug 05, 2011

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dont shoot the messanger!

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I think I may finally have the answer for the "black screen of death" for the 42" Polaroid LCD televisions. I was having the same issue with the screen going black after a couple minutes of being on. I would shut it down then turn it back on and it would work again for 5-10 minutes. On the "power board" which is the board on top, there is a little red light that turns on when the screen would go black. above that there are 4 little switches, the lower on says BURN. I simply switched that over and the television has been working for 2 days for 8 hours + each day. Hope this help. Let me know

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