Hitachi 58HK6100U LED TV - Sound but No Picture

[Bloopeta]

Have a Hitachi 58HK6100U

TV turns on, and sound is still heard, but no image, just blank white screen, with vertical lines.

Im guessing either Tcon or Panel? Is there any known issues with these? Is there any tests I can perform to determine if its the Tcon? Or is it just a case of replace it and see?

Any help grately appreciated.

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

Have also tried unplugging left cable on Tcon, half the screen went blank, and other half still displayed the white picture with vertical lines, same as before.

Unplugged the right cable, and half screen goes blank, but the other half displays the image correctly as a working TV would

[dskall]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

No doubt a panel problem. Short on panel?

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

No doubt a panel problem. Short on panel?

Would that be repairable?

[dskall]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

Maybe just a bad cap on bad side of panel board.

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

Maybe just a bad cap on bad side of panel board.

Am I right in thinking, that if I check all the caps with DMM set to Ohms, and they all show readings consistent with others, and stabalise on a number they are fine?

And if I get 1, where the reading just gets higher and higher, with no sign of stopping, that one is bad?

C346 being the one in question

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

And how do I know what capacitor I need to replace C346? I cant see anything written on it? I have never had to replace a capacitor like it before, i have only had experience with the larger cylindrical type, with the numbers are clearly written on the side.

[diif]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

They usually fail short, occasionally open.

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

They usually fail short, occasionally open.

Im pretty sure its the one Ive mentioned, but Ive no idea what the numbers are for it to purchase a replacement 🤣

[dskall]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

First remove it and see if that fixes the problem.

[lotas]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

You can run without this capacitor, it does not play a big role.

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

You can run without this capacitor, it does not play a big role.

Ah I wasnt aware of this, thankyou

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

First remove it and see if that fixes the problem.

I will try that thanks

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

So, I have removed it, and fault still exists.

Also If I use DMM on the board, with cap removed, but where it was positioned, I get the same outcome of reading just going up and up

[lotas]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

Disconnect the cable first, then measure the resistance on the ceramic capacitors in the faulty panel bar.

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

Disconnect the cable first, then measure the resistance on the ceramic capacitors in the faulty panel bar.

With the cable unplugged, Im mainly getting no readings on most???

What should I be looking for? If I set DMM to 20k Ohms

[lotas]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

You must find a capacitor that has a very low resistance (a few ohms), if the multimeter has a continuity, then the multimeter will beep on a faulty capacitor.

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

You must find a capacitor that has a very low resistance (a few ohms), if the multimeter has a continuity, then the multimeter will beep on a faulty capacitor.

None beep if I touch both ends of caps on continuity setting.

However, with one MM probe to earth, and checking caps, they all beep except this one in pic C449. I also cannot get a reading set at 2k ohms

[lotas]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

Basically, these are shunt capacitors for powering the matrix and one output will always be on ground.

[Bloopeta]

Re: Hitachi 58HK6100U LED TV - Sound but No Picture

Basically, these are shunt capacitors for powering the matrix and one output will always be on ground.

Ah I see, so that is fine then

Any more suggestions as to what it would be and what I can try?