Sony XBR-75X800G - Android start up only and dark blue screen

[NolesFan]

Let me know if not good enough.

[nomoresonys]

Can you show a detailed picture of both tcons?

[NolesFan]

I guess you could try the taping in the video, just for fun and curiosity.

I got a good working Tcon and was getting different readings compared to the original, and still no picture I did try the tape in several places but nothing. Everything is still the same with no pic just sound. I guess the panel went to ghost. I wish I knew more because in those videos you sent, they get very detailed in what to do, I just dont have the knowledge to know what everything is to read, or what it should or not show. Appreciate all the help.

[NolesFan]

Thanks for all the abbrevs to look for. I took several photos so I could zoom in and what the hell everything is saying. Ill see what I can find. Hopefully get some answers.

[NolesFan]

I guess you could try the taping in the video, just for fun and curiosity.

I thought for this you needed to have at least one of the reading in the mid 20v ? If not, yes I will def try it, cant hurt at this point.

[NolesFan]

You checked it with one ribbon cable at a time connected correct? hmm, that might be a good thing, maybe just the tcon is bad and the panel isnt shorted?

Yes that is correct.

[nomoresonys]

For vgl its voff, veeg, vgoff -7 to -9. Another voltage to check is vdd also known as v logic, dvd 3.3 volts. Another is avdd also known as vdda, vda 12-18 volts.

[nomoresonys]

A few other names for vgh are vgon,von,dvdg. 25-30 volts.

[nomoresonys]

I guess you could try the taping in the video, just for fun and curiosity.

[nomoresonys]

You checked it with one ribbon cable at a time connected correct? hmm, that might be a good thing, maybe just the tcon is bad and the panel isnt shorted?

[NolesFan]

So ok, I was able to watch a few other videos and saw where its also called VONE and VOFFE. I have found VONE on my Tcon, but it doesnt read anything ( 0.01v ). I tried the ribbons to see if I get half a screen, and no i dont and the voltage stays at 0.

[NolesFan]

In the video I linked, he has no picture so this is possibly your issue, its easy enuf to test just as he does, if the vgh is missing it IS panel problem, a new tcon will not fix that issue.

For the life of me I cant find anything labeled VGH. Ive tested what ever I can find that has a V and so far so good on the readings though. I keep looking for it though since you said if there is no VGH then its the panel, might as well till I try a new Tcon

[nomoresonys]

Yeah, what the hell just try a new tcon.

[nomoresonys]

Of course not nomoresonys, dont like giving up, but when its an avenue that I dont travel much and I dont understand things or words. By nature I like to try to fix everything before i throw it away, but my skill level in electronics of this nature is not very high. Ill try to run the updates and all that and see if that helps. I was actually going to try a new Tcon board also just to see. Right now, there is no change in the screen if i unplug the Tcon or leave it plugged in with the ribbon cable coming from the MB.

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[Diah]

Sorry Diah, I assumed by the statement since I was having trouble getting the plate off ( small things ) and the doubt about the standalone test and then with the final seek help before i cause damage, I figured you were doubting me and wanted to give up. I doubt my skills haha thats why Im here. i was able to figure out how to remove that panel, after the screws removed there were 3 of 4 black things holding it in place that needed to be pushed in so the panel could be lifted and slid back. I could see the panels and all the u shaped ribbons running to the panel itself.

good you did it... disconnect the U ribbon and check the screen if you could find any white color par or image.... if nothings on both U ribbon disconnected..... try the easy way run firmware..... or hard reset.... or at end replace T-CON

[nomoresonys]

Of course not nomoresonys, dont like giving up, but when its an avenue that I dont travel much and I dont understand things or words. By nature I like to try to fix everything before i throw it away, but my skill level in electronics of this nature is not very high. Ill try to run the updates and all that and see if that helps. I was actually going to try a new Tcon board also just to see. Right now, there is no change in the screen if i unplug the Tcon or leave it plugged in with the ribbon cable coming from the MB.

In the video I linked, he has no picture so this is possibly your issue, its easy enuf to test just as he does, if the vgh is missing it IS panel problem, a new tcon will not fix that issue.

[NolesFan]

Do you really want to give up? ALL is not tried yet, now listen up, DO or at least try to do the update/re-pair, no joy then DO these tcon tests, a video is worth a million words. This is one of those youtubers that knows what hes doing, just follow his lead, lets see what we get. once again this is tv repair not brain surgery, these tests are really not that hard, specially with a good how to video right there: https://www.youtube.com/watch?v=P5uD1tzMdUs

Of course not nomoresonys, dont like giving up, but when its an avenue that I dont travel much and I dont understand things or words. By nature I like to try to fix everything before i throw it away, but my skill level in electronics of this nature is not very high. Ill try to run the updates and all that and see if that helps. I was actually going to try a new Tcon board also just to see. Right now, there is no change in the screen if i unplug the Tcon or leave it plugged in with the ribbon cable coming from the MB.

[NolesFan]

lol... common.... sorry man. i have doubt right now with yours standalone test and this small things... please seek help from around before you cause unforgivable damage to the set

Sorry Diah, I assumed by the statement since I was having trouble getting the plate off ( small things ) and the doubt about the standalone test and then with the final seek help before i cause damage, I figured you were doubting me and wanted to give up. I doubt my skills haha thats why Im here. i was able to figure out how to remove that panel, after the screws removed there were 3 of 4 black things holding it in place that needed to be pushed in so the panel could be lifted and slid back. I could see the panels and all the u shaped ribbons running to the panel itself.

[Diah]

Ok thanks for trying and appreciate the patience. If you have doubt with the standalone test, which Im guessing that means you think either A its the panel or B my skills at the test, then theres no point in going further and Ill scrap it.

i didn't judged yours skill or any other users.. i just have concern no damage happen to the set
all screw of the plate need to take out...

[nomoresonys]

Those tests on tcon have been done OVER and over and are tried and true, when you have missing vgh with one cable unhooked but comes back with the other side unhooked, you have found the fault, this case is the panel, which can be "fixed" or at least made workable.