GRANDIN 80cm LED TV malfunction

Question

Hello,My GRANDIN 80cm TV suddenly broke down (black screen but if you're in the dark you can make out the image, the sound works though) and I've only had it for two and a half years so it's obviously out of warranty!I was thinking it might be the backlighting or the LEDs, but I'm not very knowledgeable about this. Has anyone else experienced this problem? Do you know if I can change the part myself or should I call in a professional (if so, how much?)Thanks in advance.

yoyo7800 · Accepted Answer

If the television in question is indeed an LED television, then there is no inverter. Inverters were found in laptops until around 2009. But the inverter powers the tubes (neon) that are in the panel. However, one must be careful with an inverter. The tubes (CCFL) for backlighting have a fairly high operating voltage. So, if an inverter from a small television (24 inches) is used in a 88cm (32 inches), the voltage may be too low, conversely in a television larger than the one in question.

Here is what an inverter looks like:

If you have this kind of board in your television, it's probably because it still uses CCFL tubes for backlighting. You will therefore need to replace this part.

nadellen · Answer

hello
in your case, it is indeed the backlighting of the panel that is the issue
this is also called an inverter but the term is more commonly used in computing
in fact, it serves the same function as the starter for fluorescent tubes
so this part needs to be replaced
the most complicated part won't be changing it yourself if you have some knowledge
it will be finding the part.
but if you manage to identify the exact reference, an internet search should help you
know that this type of part can be fitted on several TV brands
but if you're not familiar with it or unsure of yourself, call a professional; the repair shouldn't be expensive, ask for a quote.
because it still needs to be compared to a new TV; in this size, prices have dropped, and this brand is already rather low-end from the start

yoyo7800 · Answer

Hello, when you say "when you're in the dark you can distinguish the image," does that mean in complete darkness or with a light pointed at the screen? As for the repair, unless you have a soldering iron and/or a hot air soldering station, it might not be very easy to fix! It's probably a blown fuse or a faulty capacitor (those mounted through holes):

I fear that you'll have to call a professional, but I don't unfortunately know the cost of that. You could possibly disassemble your television to check the capacitors. If one or more are bulging, they are dead. They need to be replaced:

For the fuses, you need a multimeter to check if they are blown (continuity test). If you don't have this equipment, you should contact a professional.

GRANDIN 80cm LED TV malfunction

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