Hello, need some ideas on fixing tv, so got tv with no picture, checked ceramic caps in lcd, found one bad, replaced, got picture back, in some time no picture again, checked all caps, looks good, when I disconnect tcon, turn on tv, and plug in tcon, picture is ok, and running with no issues, trued different tcon, same symptoms. any ideas on that?
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Re: LG smart tv 65UH6030 4k No picture
Did you try a factory reset? if that don't work try a firmware update if you didn't already. -
Re: LG smart tv 65UH6030 4k No picture
Yeah, tried upgrade, tried resetComment
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Re: LG smart tv 65UH6030 4k No picture
Wonder if something got borked up on the mainboard, eeprom/spi/nand?Comment
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Re: LG smart tv 65UH6030 4k No picture
TV fixed, there was one bad mosfet (12V T-Con line) on main board (was giving 7.8V in standby), after replacement TV is back to lifeComment
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Re: LG smart tv 65UH6030 4k No picture
Nice fix, glad to hear it, another save.
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Re: LG smart tv 65UH6030 4k No picture
Not sure why these LCD panel tabs caps keep failing. I found one on mine that's on a 16V rail that fails. All the output voltages on the TCON were 0V, when that 1/4 section of the tabs was connected. Luckily only a handful of caps to try and I got lucky too. TV is up and running.Comment
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Hi,
i want to repair a Sony KD-75XF9005 TV that initially only showed a grey picture.
Backlight seems to work, Sound (Setup menu after reset) works.
If i dissconnect the left FFC cable from TCON to panel i have half a screen on the right. If left cable is connected always only the grey screen.
Interchanged the cables, its always only the right side that is working. Always grey if left side is connected.
With my small knowledge i would think at least the cables are good.
Can this happen because of a bad tcon board?
Or is it always a bad/shorted... -
Hello Everyone,
I have an Onkyo TX-SR353 Audio/Video Receiver (5.1 ch with HDMI) that I am having a really hard time diagnosing and I'm about to throw this in the junk and go buy a new unit that is on sale until the 7th.
Symptoms:- Intermittent (part of the reason why i'm having a hard time isolating problem), sometimes will work for 10+h at a time without issue
- Original symptom was wife reported loud banging noise (like someone was banging on the wall with their fists) from the LEFT SURROUND speaker and then the unit shut off.
- I swapped the Left and Right surround
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Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side... -
hi
i have a samsung lcd tv
it powers on with sound and backlight but no picture
all voltages from PS are good 12v 3.3v and 5v
whats odd is that at the tcon i tested voltage across the fuse on the tcon and i get 0v
i figured main board issue..so i ordered a used main board....when i put replacement main board in i still have same issue
no 12v at the tcon fuse
i disconnect the panel ribbon cables to rule out any panel issues and i still have no 12v at the tcon fuse
the odds of having 2... -
Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.
The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.
Original T-con:
Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.
First replacement T-con:
I thought it might be t-con and ordered new t-con from china(supposedly tested)...
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