A friends son has a JVC LED about 18 months old that’s dead
It powers on for and 2 seconds with the JVC logo then powers off again
I’ve tried unplugging etc and changed the main board (with the connections on)
This gave the same issue - I’m now thinking I’ll change the main power board - I can pick a sh one up for £10
Surly there’s nothing else it can be ?
Anyone got any experience with this - it’s a nice smart tv with wifi etc - and I do like to ‘tinker’
Thanks
Is it actually powering off? If it's staying on then its probably some component of the LED backlight that's failed (so the picture may be showing but there is no illumination to display it, if that makes sense).
Sent through the ether by diddling with radio waves
Maybe too late if you've tinkered with it but most electrical goods should have a 2 year warranty.
It seems to be actually powering off - holding down the power switch on the side will power it back on again showing a red standby light
I feel they would have trouble getting Currys to sort it in the 1st year let alone after
Last edited by lewie; 3rd December 2021 at 15:06.
Is it a smart TV and could it be updating software?
My TV box does that occasionally - just appears to die then after several minutes wakes up.
It is but it’s not connected to the network at allOriginally Posted by Stanford
If a proper working board is £10 then it’s cheap enough and worth a chance surely?
I’ve ordered it earlier so fingers crossed
Could be one or two of the LEDs burnt out. The LEDs are in horizontal strips and if one goes then the TV will cut the power in order to protect from over voltage on the remaining LEDs in that strip.
I had this on a 40 inch TLC TV, similar powering off issue to yours. I was able to get a replacement led strip and do the job myself.
Plenty of instructionals on ytube.
Are you talking about the back light LEDs? If so did your TV pulse/flash the screen before switching off?
Agree. Retailers (some) try and cling to the old “12 month warranty” but the law doesn’t say that. I’d have thought you’d have a warranty claim although, as K says, if it obvious someone has “had a go”, it’s probably too late.
Sorry, yes, <i mean the backlight LEDs. I don´t think mine pulsed before switching off. There is a trick to seeing if it is the backlight LEDs that is the issue. With power on, shine a strong torch at the screen and you should see an image (TV homescreen or whatever). If no image then it is something else. Good luck!
Thanks
Think you right on the led side - 2nd board replace - same issue - sadly will have to go to land fill I think
If the 2nd board was actually the PSU board then have you tried putting back in the original 1st board that you swapped out in case that is also faulty?
As suggested try shining a torch up close to the screen to see if you can see the logo.
If it is instantly switching off then it would suggest that there might be a short circuit somewhere?
Yes I can see the tv logo with a torch
So you need to pull the panel apart to get to the back light LEDs, you might be able to buy replacement strips to swap out the faulty ones.
Last edited by lewie; 7th December 2021 at 00:51.
Good going Paul, is there any chance you could look at my spare one as you seem quite knowledgeable with them :)
John I’m on my way
Just to finish this tread up
New led strip installed and tv working - but….. somehow anf I don’t know how as I was extremely careful- the screen is cracked
Oh crap. Could have cracked if it wasn’t in a flat even surface when you took it apart. Did you have to exert any real downwards force when removing the screws holding the screen together?
No I didn’t think I did but must have - ah well I sort of fixed it
Thanks for the advice
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