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 to buyand 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.If set is opened at least look for puffed up and bad caps like in thisphoto.
SOURCE: Loud pop - no picture
Your X and Y circuit boards are bad. It might require the replacement of the power supply as well. This is not uncommon for LG/Zenith plasmas to have this issue. Not a do it yourself repair.
SOURCE: Black screen on tv
is probably the z or y board.. if u have sound the y is bad
and no sound the Z is bad
but is best to change both of then
SOURCE: PDP42V18HA No picture, but voice
Hello,
Planars can be difficult televisions to work on. The company is really only a shadow company that doesn't have any parts or service literature.
That being said, you probably have a shorted bridge rectifier on this TV. That was more than likely the pop you heard. If you have electronics experience, check the secondary on the power supply, specifically the feeds for the X and Y SUS. Also, there are always bad capacitors in these sets, so it might have been an electrolytic capacitor exploding.
If you don't have electronics experience, and have a competent repair shop nearby, they may be able to get you back up and running again for under $200.00. But they may not guarantee it to stay working for any length of time.
Hope this helps you...
SOURCE: LG plasma tv made loud popping noise
The plasma gas tubes may be damaged or the gas couldve leak out. remember plasma have to remain upright at all times even when transporting them, if they are not you should just set it up straight for about 3-4 hours before turning it on.
SOURCE: I heard a loud pop then tv screen went black, now
hi friend,,,,,,,
i think due to high voltage resistor in dma board has blasted,,,,,
did u see any burnt marks,,,,,,,,,reply me
thank u,,,,,,,,
117 views
Usually answered in minutes!
×