LG Informative - LG LCD TV 42LB1DR-UA & Power Supply Issues...
ASHBURN, VIRGINIA -- I've had my LG 42LB1DR-UA LCD TV for 2.5 years now, and I'm generally very pleased with it, especially the built-in DVR feature. It did recently have a common power supply failure however. I've noted that others have commented on the same topic, and wish to suggest a method to prevent a recurrence. I'm an electrical engineer, and looked over the failed power supply board on my unit. The failed parts are obvious: under-rated electrolytic capacitors that bulge out when they fail. The problem is that LG design engineers did not properly de-rate the components selected... the breakdown voltage rating is too low for the application. Replacing the electrolytic caps (1800 uF 16V and a few smaller ones nearby) with the next standard size (1800 to 2200 uF at 25V, etc) will likely prevent this problem, though one might need to get creative in order to get the larger parts to fit on the board.
While the set was open, I also noticed that the DVR disk drive is a common Seagate SAS/SATA 160 GB unit... it can easily be upgraded to 320 GB. Something to think about after the warranty runs out. :-)