Re: Lg 42lg30 need help with inverter question

hello,
thanks for the response.I did take apart the panel and there was broken bulbs but from the buld holder board had started on fire on the master inverters side. i replaced the board with a used on and replaced the bulbs from another 42 inch lg but the board started arching at the exact same spot! i shut it off but can not determine why this is occuring. can you tell me how you check the mosfets? i had read you read the ohms and they should read 8.5 but the ones on the slave are reading 10. i took a backlight panel i had...

Re: Lg 42lg30 need help with inverter question

hello,
i know i havent given any photos that would be of help to get an idea of what is going on and i also know my information makes more sense in my head as i type it than it does when you read it but i thank everyone for thier help so far and for putting up with me.
I was doing some poking around tonight on the tv and happen to come across something and wanted to know if anyone can give me an idea of if the way this is reading is wrong or right.
on the connector from the power supply to the mainboard there...

Re: Lg 42lg30 need help with inverter question

yikes! how is the proper way to test inverter output? other than from very very far away!

Re: Lg 42lg30 need help with inverter question

hello,
thanks, i was measuring the output at the pink and white wires going to the bulbs.
thanks

Re: Lg 42lg30 need help with inverter question

here is my master inverter that i believe is causing the problem.With the inverter disconnected from the bulbs and turned on i cant get a voltage reading on my meter it just errors out my meter and puts it in hold mode.If i do the slave on ac voltage the meter reads 33volts for a sec then drops to almost nothing....

Re: Lg 42lg30 need help with inverter question

thanks for your help- i have found other issues that may lead to the repair of my tv.I am adding this info in hopes of getting a better direction of where to check for problems. when plugged in and turned on the power light slowly flashes red twice then goes solid blue. If i plug in my ps3 via hdmi in hdmi one with the inverters unpluged i get image BUT NO SOUND AT ALL then if i switch to hdmi 2 or 3 i get nothing no video or sound. Is it possible its a bad audio video mainboard causing my backlights to shutdown and lose audio? if so...

Hello,
i would like to thank anyone who responds for their time.I am new to the site but have used some info to fix a few tvs. i am just learning and doing this as a hobby and to add some lcd tv's to my house My problem is i have an lg 42lg30 lcd tv that i bought with a bad backlight problem.The backlight would go on for a second but go off and the screen did not show a usable screen.But if i disconnect the inverters from the bulbs the screen when viewed in the dark with a flashlight shows a good image. Now for the info on what i have found.First when i got the tv i could smell burnt...