Lg 47LV5500 issues.

[Malachi]

Re: Lg 47LV5500 issues.

I already have done my fair amount of pad lifting.
The problem is that is I mess a board up, there are no others available to replace it with and with most shops having a policy of not working on a board if a repair attemp has been made, I have to room for error.

[ReeceyBurger123]

Re: Lg 47LV5500 issues.

Practice on a dead board then ? Come on I know you can do it when you get used of it its easy as anything.

[Malachi]

Re: Lg 47LV5500 issues.

There are somethings you can't get better at. No matter how much I practice, I could never do what Messi does for example. Lol
May I am at my best level now.

[ReeceyBurger123]

Re: Lg 47LV5500 issues.

I tried, for the last time though. I give up as you have. Give it a reflow though bud and let us know.

[tvtimmy]

Re: Lg 47LV5500 issues.

Sausage/pepperoni and a pint of Miller High Life. Just keep a close eye on it!
It's already not working so you can't get it fuct up. You can find them for replacement, you just have to look every day. Best of luck.
P.S. I know why this is a bad idea Reece, but when out of options, got to improvise.

[Malachi]

Re: Lg 47LV5500 issues.

Thanks for trying reecey. I hope this doesn't mean you'll stop giving me advice.

[ReeceyBurger123]

Re: Lg 47LV5500 issues.

Not at all lol just will stop trying to get you to do complex stuff ehy

[Malachi]

Re: Lg 47LV5500 issues.

Is it really just as easy as this reecey? https://www.youtube.com/watch?v=MgtzEnMWohw

[vinceroger69]

Re: Lg 47LV5500 issues.

Is it really just as easy as this reecey? https://www.youtube.com/watch?v=MgtzEnMWohw

I have changed a couple myself now and im still learning the first one i did was with a soldering iron like in the video the second time with a hot air station and it is easy in my opinion just take your time or maybe if you get the ic and dont feel like changing it maybe theres a badcaps member in your area willing to help you.
Yes there is always a risk of lifting pads on any pcb we all have probably done a few in the past but most can be fixed easily enough.

[Malachi]

Re: Lg 47LV5500 issues.

Well this is for another tv I have made another thread about. It is an 8 leg eeprom chip, and looks less daunting. The chip is $15 and the board on eBay is $43.
There are 2 32" tvs listed on Craigslist in my area under $50. One for $50 and the other $29, so it's hard to justify spending $43 for the board.

[Malachi]

Re: Lg 47LV5500 issues.

Well I just practiced on a bad board. Using my soldering iron I took an 8 legged IC chip off and put it back on. Taking it off was easier than getting it back on.
Have to make sure I don't bridge the pads.

In the mean time I've taken my heat gun to the cpu of the main board to this tv. Not sure how long I should have kept it on there. I couldn't see the solder on it as it is covered by the chip I guess.
I did about 2 minutes about 2 inches away at low setting. My heat gun has low and high.

There is a repair service on eBay for it for $135, I asked and they said the repair doesn't involving changing the eeproom, so I don't really know what they do.

[vinceroger69]

Re: Lg 47LV5500 issues.

everybody does reflows diffrent i tend to add flux too then heat the board from underneath then do the top side.
Maybe they do change the eeprom but dont want anyone to know they charge that much for doing it? as if thats all they change its a good profit.

[Malachi]

Re: Lg 47LV5500 issues.

It worked for a bit. I got the onscreen display for about a minute then it went off.
I did use flux. I didn't hear the bottom as there are tiny capacitors on the opposite side.

Maybe I should try the oven method.

[Malachi]

Re: Lg 47LV5500 issues.

10 minutes in the oven at 390F didn't fix it either. Now it's stuck on the lg life's good screen.
I guess I'll have to send the board out.

[ReeceyBurger123]

Re: Lg 47LV5500 issues.

No no it needs a reflow mate. Give it a proper go with the heatsink removed and use flux and slowly heat and get closer to the chip.

[Malachi]

Re: Lg 47LV5500 issues.

Should I leave the heat gun on low or high?

[diif]

Re: Lg 47LV5500 issues.

Should I leave the heat gun on low or high?

You want about 220c or 425f to melt lead free solder.

[Malachi]

Re: Lg 47LV5500 issues.

M heat gun only has low or high. I don't wan to damage the cpu or gpu. Not sure what it is exactly.

[Malachi]

Re: Lg 47LV5500 issues.

There really is no place to put the solder. I can't see any of the pins. Do I just put some around the edges? That's what I did the first time.

[diif]

Re: Lg 47LV5500 issues.

Yes, put it round the edges, when it gets hot it gets wicked underneath to do the magic on the balls.