Another LG, Another TCON Issue.. 55LN5100

[Michale32086]

This one is not so bad as yesterdays..

Just got in a 55" LG this morning.. Powers up, backlight, no display..

Swapped out a few Main Video Boards.. Same issue..

TCON it is... No shorts or blown fuses this time..

I found a similar TCON in my parts jungle.. Literally.. A jungle..

Taaa Daaaaa.. It works!!

But the display is upside down.. I have run into many upside down displays, but it's usually the Main Video Board that's the issue.. Swapping out FIRMWARE chips usually takes care of that..

But I think I need to go thru the Service Menu to fix this..

Anyone know how to access the Service Menu on the LG LN series??

I have tried TV MENU/REMOTE MENU and TV OK/REMOTE OK... No luck...

Any help... Most appreciated..

[handsworth]

Re: Another LG, Another TCON Issue.. 55LN5100

I have a LG service remote that accesses the service menu. Costs $40, but paid for itself many times over. I also have many LG tcons available. Which correct one do you need. 6871L-xxxx

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

I actually found another in my parts jungle.. Works fine.. Thanx for the reply... So, yer saying it's a special remote that is needed??

Thanx again...

[handsworth]

Re: Another LG, Another TCON Issue.. 55LN5100

Yes, I do a ton of LG tvs so this was a great tool. Its called LG Factory SVC Remocon Model# MKJ39170828. Saw a few on Ebay $10.

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

Awesome!! I'll check into that.. Yea... The LG infamous LED issue?? Almost single-handedly Keeps me in business....

Thanx again..

[neilc6]

Re: Another LG, Another TCON Issue.. 55LN5100

There is also an app if your smartphone has an IR blaster. I have a LG service remote I bought off ebay. To do a factory reset on LN series, Instop and 0413. Instart gets into service menu.

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

Looks like I might have to avail myself of that...

The TCON board I put in crapped out after about an hour.. Now I am back to a backlight but no display..

I am going to put the upside down TCON in it tomorrow morning and let it run for a couple of hours.. Hopefully it's not something else frying TCON boards..

If it lasts the burn in, I'll try the factory reset...

Thanx again to all who replied..

Seems like TCON boards are my nemesis this week...

[neilc6]

Re: Another LG, Another TCON Issue.. 55LN5100

Panel faults can fry tcon boards. I would look for liquid damage on the edge boards.

[Topcat]

Re: Another LG, Another TCON Issue.. 55LN5100

Since you've eliminated the signal processor board, this is moot....but a bunch of LG's I've seen needed their processor chips reflowed.

[budm]

Re: Another LG, Another TCON Issue.. 55LN5100

Looks like I might have to avail myself of that...

The TCON board I put in crapped out after about an hour.. Now I am back to a backlight but no display..

I am going to put the upside down TCON in it tomorrow morning and let it run for a couple of hours.. Hopefully it's not something else frying TCON boards..

If it lasts the burn in, I'll try the factory reset...

Thanx again to all who replied..

Seems like TCON boards are my nemesis this week...

Did the T-CON fuse also blown?

[petehall347]

Re: Another LG, Another TCON Issue.. 55LN5100

wondering if say power supply was high voltage it may blow the tcon ?

[vinceroger69]

Re: Another LG, Another TCON Issue.. 55LN5100

if you need to flip the image maybe this lg service remote apk will work it is very easy, just audio or IR with android

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

Did the T-CON fuse also blown?

Nope.. At least, not on the first one...

I haven't had a chance to check the replacement, but I have a feeling that the fuse will be good on this one as well.

Should know more in a few hours when I get to my shop..

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

if you need to flip the image maybe this lg service remote apk will work it is very easy, just audio or IR with android

That's awesome, dood!!! Thanx a bunch.. VERY much appreciated..

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

Since you've eliminated the signal processor board, this is moot....but a bunch of LG's I've seen needed their processor chips reflowed.

Yea, I know what you mean... I have had quite a few LGs where the boot-up process would freeze at the logo... I am assuming that's a processor chip issue as you describe..

A reflow usually fixes those right up..

That's one of the nice things about LGs.. They break easy but they are, by and large, easy to repair, once ya identify the problem.

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

Turns out that THIS TCON had the fuse blown.. Put the upside down TCON in it and gonna let it play for a few...

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

if you need to flip the image maybe this lg service remote apk will work it is very easy, just audio or IR with android

I just looked at my phone and I remembered I bought the SMART IR App a bit ago....

How would I incorporate this LG APK into the existing app??

EDIT:

Never mind.. It came up.... I push IN-START and it prompts for a password.. Grrrr.. Nothing is ever easy

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

Passwords 0000 and 1234 and 1111 do not work...

[vinceroger69]

Re: Another LG, Another TCON Issue.. 55LN5100

I just looked at my phone and I remembered I bought the SMART IR App a bit ago....

How would I incorporate this LG APK into the existing app??

EDIT:

Never mind.. It came up.... I push IN-START and it prompts for a password.. Grrrr.. Nothing is ever easy

i have not got a android device here at the minute too test the apk are you using your version you brought? or the the i uploaded? user on this fourm DIAH first uploaded this file a while ago no one has said it needed a password maybe send diah a pm and see if he knows the password if its needed try 04103

[Michale32086]

Re: Another LG, Another TCON Issue.. 55LN5100

i have not got a android device here at the minute too test the apk are you using your version you brought? or the the i uploaded? user on this fourm DIAH first uploaded this file a while ago no one has said it needed a password maybe send diah a pm and see if he knows the password if its needed try 04103

OK I'll install the APK and see what happens.

Thanx again..