LG 42LN540V LED Backlight Flickering After Replacement When Connecting The Screen

[RetroComputingGrotto]

Can you explain a bit? have you fractured the panel?

My hand shook when attempting to reflow the driver IC and a couple of solder balls appeared to the side of the IC so I killed it - all adding to experience as like I say, these small BGA chips were not around on the TVs I repaired 25+ years ago at College.

At the end of the day for £24 I got two days of experience and knowledge of how a modern day TV works compared to the old CRT ones and the comments from all you guys in invaluable to me - much better than any expensive training course. I've kept what I can for spares and labelled the board and LEDs up with the make/model of TV they came from.

I've got a load of MIDI keyboards and wall mounted speakers to repair for our Music department to keep me busy now!

[EazyBone]

Well here's the first confirmed case.

Rip tv

[Davi.p]

You made a big mistake, i never suggested you a reflow and especially i told you driver ic, not processor, i mean backlight driver ic, it is on the power board.. you could have asked info..

[RetroComputingGrotto]

You made a big mistake, i never suggested you a reflow and especially i told you driver ic, not processor, i mean backlight driver ic, it is on the power board.. you could have asked info..

The TV was replaced 2-3 weeks ago so this was purely a learning/training exercise - even if it had been successfully repaired, there is currently no use for this TV and £24 for a couple of days self learning/training a 12 year old TV worth bugger all is a bargain as any kind of training course would cost more than double that per hour!

[Davi.p]

If you reflow random, which type of training is?

[RetroComputingGrotto]

If you reflow random, which type of training is?

Reflow training.

How do you get experience of reflowing ICs when you have no ICs to reflow - the answer is to reflow things and learn from it. Just like soldering, how do you practive soldering, you solder things. How do you learn to drive a car, you drive an actual car. How do you learn to play a piano, you practice on a piano no matter how badly someone like yourself tells you you're rubbish and need to play better - how can you play better without playing badly to begin with and practice to make perfect?

How would you suggest I learn to reflow IC's - watch youtube vidoes of someone else doing it? That's not gaining any experience at all, just knowledge. Ive seen people do it countless time but without actually doing on on worthless items that are destined for eWaste/WEEE how else will I gain experience? You may have a bespoke Electronics Servicing Virtual Reality headset with a virtual soldering iron and hot air reflow workstation (I assume that's how you've gained your vast knowledge and experience, as that's the only alternative I can think of rather than actucal PCBs) but I don't have the luxury of such a VR system so I will stick to gaining knowledge and experience by using physical PCBs.

You wont like this, but some people buy faulty TVs like the one I had (and other such items like mobile phones and iPads) from eBay so they can practice randomly reflowing and soldering/desoldering different components to gain experience in doing it so when it comes to doing it for real they have some idea of what to do and what not to do.