DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

[reality]

Hello all, Please, i need help. There is a Deg 32" lcd tv that i am presently repairing, it has no model no. If i power it on, the backlight comes on and i can switch it on/off with the remote control. Other buttons like MENU, VOLUME, PROGRAM etc display on the screen but no picture or sound. The screen is blank with a light grey color. I have read the voltages from the power board and there are accurate. Please, can somebody suggest what else to try. i will be very grateful. Thanks in advance.

[tom66]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

So, if you press the MENU button, the TV's system menu appears?
This would be a main board problem -- the main board is the one with the video inputs on it.

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Thank you very much Tom66 for your prompt reply. Like what components should i text in the main board. I have attached a picture of the tv panel. Please, kindly indicate the main board to me and the areas to check.thanks.

[tom66]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Looks to be some Vestel variant -- the main board is that largest green one in the middle of the TV.
Please confirm that when the menu key is pressed on the TV you can see the full menu on the screen.

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Thanks a lot Tom66, i really appreciate you concern. Yes! The MENU does display and you can select any input like AV/TV, tuner, scart 1, scart 2 etc. But if a dvd player or cable is connected, it does not show any picture or sound.

[tom66]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

OK, do you have the original or a compatible remote?

[selldoor]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Could it be stuck on hotel mode?

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Yes! I have the original remote.

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Please, "what is stock on hotel mode"?

[tom66]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Hotel mode is probably not relevant for this model, though the next steps will tell us anyway.

OK, so turn the TV on to an analogue channel (where you would normally see snow if the TV was working properly.) Then press MENU on the remote, followed by 4, 7, 2, 5 in quick succession. If all goes well, a secret option menu should appear. Can you show us a picture of this?

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Please, i am sorry for the delay, it was due to power outage. I had to borrow a generator as mine is faulty. I have done as you instructed and i have attached the picture. Thanks for your help.

[tom66]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

OK, what is under the other menus (use left-right I think to select the menus -- the icons at the top.) A picture of each would be helpful. Sorry to hear about the black out. Are they very common? I have a friend in South Africa who gets them every day :/.

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Here there are Tom66. Thanks a lot. As for black outs, it's natural in Nigeria, we experience it very often. sometimes, ten times a day.

[tom66]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

If you use the down arrow on this menu:
https://www.badcaps.net/forum/attach...6&d=1364055075

are any other options available?

I'm looking for a "factory reset" option, if one is available.

If not, we will have to look at the EEPROM on the board.

Worst case, look up prices for 17MB11-6 main boards. You may have to order them from Europe. There's plentiful supply here, so the price is generally quite low, but I don't know if they will ship to Nigeria....

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

I have scrolled down with the down arrow but there are no other options. Do we now look at the EEPROM on the board?

[selldoor]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

When you have finished Toms Tests
Did you check that the sound was not just muted? -With a known sound source connected
press the mute button on the remote control.
Also check the cable that goes from the main board to the panel is secure - take it out
check for bent pins and replace.

[tom66]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

I wouldn't think the second test is necessary, after all the user is getting an OSD (menus etc.)

Regarding the EEPROM, I think it is this device, can you confirm the marking printed on it?

Also I am thinking that "initial aps" may be worth considering.

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Thanks Selldoor, I have checked the mute but it is not muted. I have also checked the cables and all is in good condition but still no picture or sound.

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

Yes! i can see it. how did you get that board? I thought it is not common. What do you mean by "initial aps"?

[reality]

Re: DEG LCD TV(no model number) WITH BACKLIGHT WORKING BUT NO PICTURE, NO SOUND

So what do you suggest Tom66,do you think i should replace the EEPROM?