Sudden power failure

is the new power supply voltage the same as the area that you left

hi, there seems to be dead short somewhere i'd unplug all the leads from the power board and plug one in at time, then power up the set to see which board is blowing the power supply hope it helps

regards
shaun

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.

Yes you can replaced it on your own..


just open the back cover and replaced the bad power supply board...its very easy just like plug and play..

Thank for using fixya...

the power supply board is shot at.................
needs replacing.......easy fix to do yaself.

I found this on another website, most likely it is your power supply capacitors.

1. Press the "reset" button and hold for 10 seconds .... Does TV turn on and blinking green light turn to solid green.


2. Unplug the TV from it's power source for various times, ranging between 5 minutes and 24 hours..... Does blinking green light continue upon plugging in the TV.


3. Disconnect ALL devices from the TV; DVD, Tuner, Cable Box, unplug the TV for various duration times .... Does blinking green light continues upon plugging in the TV.


4. Press Power and Menu buttons simultaneously and hold depressed for 20 seconds .... Does blinking green light continue to flash.


5. Press Power and Display buttons simultaneously and hold depressed for 20 seconds .... Does blinking green light continue to flash.


6. Insure that no front panel buttons are inadvertently stuck in an "engaged" position.

Diagnosis: If none of the above test resolve the issue, then the failure lies in one of the following:

1. DM Module Capacitors have FAILED.
2. DM Module is defective.
3. EEPROM Board failure
4. Power Supply failure.

Hi All,
I have a similar problem with a Swisstec 32" LCD (older than 3 y.)
I decide to open it. Unconnect and re-connect the on/off button PCB. Then the TV don't switch on/off anymore. If you have a better solution please let a message.