LG 42LB1DR No Video or Sound

[dorp90]

Re: LG 42LB1DR No Video or Sound

Hey so I just got the TV working. I purchased 2 MOSFETS to replace the 8pin ones on in the specified area. Replacing these MOSFETS was a pain because even after i melted the solder with my heat gun the MOSFETS would not come off easy because they were held on with some type of adhesive as well. I was able to replace one and while replacing the other i became extremely frustrated and a handful of the CAPS i replaced started falling out do to the lower rosin-core solder becoming fluid. I stopped and did not replace the other MOSFET or the CAPS that fell out. I found a replacement power board listed in working condition on EBAY and was able to buy at my offer of $25 with free shipping. I installed the new board and the TV is now working great. Thank you for all your help and I will still becoming back here first when I have issues. Thanks guys!

I have the same problem with my lg 42LB1DRA and wanted to make sure I knew what you did. You replaced the power board (yellow) not the logic/main board (green with the inputs)? Trying to finish getting this put back together to make my wife happy .

[dskall]

Re: LG 42LB1DR No Video or Sound

This is very old post. You might want to start new one.

[rickou]

Re: LG 42LB1DR No Video or Sound

Does the TV Turn on and keep the lead on but no sound and pic? Do you have 12v and 24v. Post the number of smps

[dorp90]

Re: LG 42LB1DR No Video or Sound

The TV does turn on, but no picture or sound. I can see that the back light is on though. What are the 12v and 24v and smps? Thanks.