Question about Panasonic PV-DM2792 Triple Play 27 in. TV/VCR/DVD Combo

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Picture revisited So do you think that the capacitor replacement will fix the problem? Alternative involves my spouse and kids conning me into a brand new HD system, and I'm not all that interested in spending $1500!! Thanks for your help.

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Well if it is a capacitor or an onboard component you need a technician to do the job usually you get this job done for a couple of hundreds dollars, if the technician must replace both convergence ICs, for example the charge is $250/$300. If you call a repair shop in your area and describe the problem they will give you the exact amount.

Posted on Aug 10, 2008

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Hi there can any one tell me were to get service manual schematics for wharfedale 1911w-c


Try contacting Wharfedale directly to obtain the information you need.

May 20, 2014 | Combination Televisions

2 Answers

Why does my evotel elcd40usbfhd screen only half work??????


Hi Ben
It could be a T-Con failure. There's a loss of part of the signal between the board and the display. A few components could be the culprit. Do the usual turn it off unplug for a while Ect, and see if you can update the firmware and software. Try Support@evotel.com

May 13, 2014 | Combination Televisions

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Digihome 1996wd tv blue standby light flashing and won't switch on


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Regards.

Jan 04, 2012 | Combination Televisions

1 Answer

I have an Emerson TV/VCR model EWC1902. Unit will not turn on at all. I am an electronic tech. The fuse in the power-in circuit is good. I have a-c power to the unit. I do not have schematics. What is the...


Hello,
The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.
The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.
All these can be checked on the power supply board.
But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.
The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)
You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.
What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).
You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.
Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.
If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.
I hope this helps.
Regards.

Sep 29, 2011 | Emerson EWC1902 19 in. TV/VCR Combo

1 Answer

Turn on my Emerson tv/vcr model # VT 1921.. it has no sound, no picture just a buzzing noise.. what is the problem??


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Regards.

Aug 15, 2011 | Emerson Combination Televisions

1 Answer

No picture or sound


Hi, the issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

May 08, 2011 | Toshiba MW26G71 26 in. TV/VCR/DVD Combo

1 Answer

Will not power on disc light flashing


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck...

Mar 07, 2011 | Toshiba 23HLV84 23 in. TV/DVD Combo

1 Answer

Screen goes black but the sound is still on


Hello,

If the picture of Your television goes black and the sound is still on, there is a problem inside the unit, the problem is mainly a bad t-con board inside the unit. The t-con board is responsible for the picture settings control of the television. To replace the t-con board get these instruments: a screwdriver, a glove, a cup and a replacement t-con board and please follow the steps below:
  1. Turn off the television,
  2. Unplug it from the power outlet, and allow the television rest for about 6 hours, so the high voltage on it will dissipate,
  3. Then You put on the gloves and unscrew the television open,
  4. Put all unscrewed screws into the cup in order for them not to get missing,
  5. Then You locate the t-con board, it is at the top middle of the main board of the television,
  6. Disconnect it and replace it with a new one,
  7. Then You reverse the process to reassemble the television back together,
  8. Plug it to a power outlet and power on the television.
Hope this helped. Thank You for using FixYa!!!

Jan 16, 2011 | RCA 20F510TD 20 in. TV/DVD Combo

1 Answer

No picture, just vertical color lines scrolling down. Audio is fine.


The T-con board in your TV is defective. The main board could be an issue too but the fact that you are getting sound means that the main board is most likely good. The T-con board is part of the LCD panel and usually is only available with the LCD panel.

The way to fix it is to replace the whole LCD panel. This is done by taking the back cover off and removing all the boards in the TV to get the LCD panel. When you remove it, it will leave only the front plastic bezel and replace with the new one. Reconnect all the boards to the panel and the problem will be resolved.

Oct 12, 2009 | Toshiba SD-P7000 17 in. TV/DVD Combo

1 Answer

White horizontal lines at top of picture


Yes, definitely worth fixing. The problem lies in the vertical deflection voltage-doubler circuit. The usual fault is a single capacitor of 100uF/35V that has failed. It is normally connected to a rectifier diode right at the vertical IC. Replacing the capacitor (no more than USD4.00 in price) usually gets it working perfectly again. If you are finicky around technical work, then a reputable local repair shop in your locality should do it quickly for you and charge only labour.

Jan 17, 2008 | Toshiba MD24FP1 24 in. TV/DVD Combo

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