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You should first check the output voltages comes out from its main power regulator section; and to rectify the cause of this shut down first. Then only, there is any need to enter its service mode. If you're sound in electronics, and wish to get more details,
check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic
/ Time slide, can be selected by the drop-down list, at the top left
of the display window, will make surf easy. You can also do a search, by type in the brand name/model
number/IC used, in the search box at the top right of the display window. Service mode entry, adjust and exit procedure to many brand TVs are given in detail.
First you check the speaker of your Daewoo Tv. To check the whether the speaker is good or damaged, place your year very close to the speaker side of your TV, and switch the TV by its front panel power switch, not by the remote control. If you can hear a "Thumb" sound from the speaker, as the TV is switched on, the speaker is good and you have to to further. If not speaker has got damaged and have to be replaced.
If your TV is provided with an earphone or headphone socket at its fron panel, insert a earphone or headphone pin into it and listen whether there is sound coming from it or not. If ther comes the sound, it doesnot comes to the speaker, means that the headphone or earphone socket is faulty. Replacing it will solve the problem.
If there is AV OUT from your TV, connect it to an amplifier or so to get the sound. If there is sound and no output from speaker, means the Audio Output IC inside your TV is faulty.
Just locate the audio output Ic, and replace it with same type and number. Audio Output IC can be easly located ans speaker wire goes to that section, and follow the speaker wire. locate it. If you need any more assistance, feel free to contact me through Fixya. OK.
Hello
If the sound cannot be controled through TVs front panel controls or through remote control, your Tvs electronic volume control section is in trouble. It may be an Ic probelm or some loose contact in the printed circuit board itsef. Check it by somebody who knew through about it. Contact an experienced servic technician.
The OSD IC microprocessor might have a problem, try first try resoldering the joints on the pins , if that doesnt work check for leaky Diodes and transistors around the OSD Microchip, if all else fails the IC has be come faulty.
this problem actually come from crt socket ic board (just patch behind the picture tube) need to properly clean and resolder back the joint please consult with your tv repairer and i think it not cost much
Do a complete overhaul of the regulated power supply===solder any/all bad connects,replace any weak capacitors.HB Electronics kit #103-088
will help you locate which parts go bad===get on it before it crashes hard!
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