Question about LG 42PG20 42 in. Plasma HDTV
Power on the unit in the dark room then shine with the flashlight directly in the screen, you will barely see the images. This is because your backlight is not functioning. The following reason is the caused.
1. Power supply - missing B+(supply voltage) coming from this board feeding the inverter board. This is caused by faulty transistor, dried/leaky electrolytic capacitor, open fusible resistor.
2. Inverter board - even the B+ is good from the power supply, if the fuse, driver transistor, driver transformer is faulty no output to the backlight resulting to black picture.
3. Busted backlight - even inverter board is good but if this is busted resulting to black picture also.
Diagnosing the fault is technical and if you don't have necessary tools and test instrument and can't fix it yourself, I would advice you to look for an experienced technician to isolate the problem.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
Posted on Mar 31, 2011
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 03, 2014 | Televison & Video
May 17, 2010 | LG 42PG20 42 in. Plasma HDTV
Apr 21, 2010 | LG 42PX5D 42 in. Plasma HDTV
Mar 15, 2010 | LG DU-42PX12XC 42 in. Plasma HDTV
Jan 31, 2010 | LG 42PX5D 42 in. Plasma HDTV
Jan 31, 2009 | Sharp LC-32GA5U/LC-32GA5E 32 in. HD-Ready...
642 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: