Sony XR-55A80J OLED TV 5 blinks - Troubleshooting steps

[jason123]

damaged does not mean exactly "cracked" , need to specifiy always

Sorry again, I'm not sure what you mean. Can you explain? Yes, if you're referring to panel, it could be bad, but there is not much that can be done - all other components are under sealed metal area - so beyond what I checked not sure more can be done.

[Diah]

Not sure what you're referring to. Can you explain more?

Summary (correct me if I'm wrong): Problem either with TCON (it's getting the proper voltages - and replacement is on the way) or Panel (not fixable) - The best course of action is to replace the TCON and if not fixed, then it's panel. Nothing more can be done on the panel beyond the capacitors checks.

Now when I received the TCON, I'd appreciate the help on the "pairing process" as what was mentioned with green / blue lights don't seems to correlate with my TV

i mean the Caps area which have low R. need to measure V on them
well even the service manual say t-con or panel.. and i think its panel.

[Davi.p]

I was only repeating what already said, to buy a tcon from cracked screen, not from "damaged panel" , this expression is too vague, one can receive a bad diagnose of bad panel from a techincian and sell the boards as good..

[jason123]

i mean the Caps area which have low R. need to measure V on them
well even the service manual say t-con or panel.. and i think its panel.

So say 19v evdd, the resistance of ~200ohm that's less than 100mA... that seems reasonable. Why would you think they're too low?

Voltage at black connector is roughly 19v, but at the caps that are low, voltage is 1.2v or so... not sure if tcon is limiting power, or if that's expected? Without schematic I guess it's tough for me to assess?

[jason123]

I was only repeating what already said, to buy a tcon from cracked screen, not from "damaged panel" , this expression is too vague, one can receive a wrong diagnose of bad panel from a technician and sell the boards as good..

Not like you can trust what any of the sellers say!! Sellers lie all the time... they can say "brand new" for a quick sale...so none are trustworthy....the majority say brand new tv and screen damaged during shipping. .. how can you suspect an issue there? it's always 50/50 ... not many available anyway

[Diah]

So say 19v evdd, the resistance of ~200ohm that's less than 100mA... that seems reasonable. Why would you think they're too low?

Voltage at black connector is roughly 19v, but at the caps that are low, voltage is 1.2v or so... not sure if tcon is limiting power, or if that's expected? Without schematic I guess it's tough for me to assess?

you have another 3 EVSS on buffer boards.. compare them then you know why i said panel

[jason123]

you have another 3 EVSS on buffer boards.. compare them then you know why i said panel

Lol... when did you know it was 100% panel? We should have stopped at that point, right? Don't get me wrong, I appreciate the help, but I wanted to know if it's TCON Or Panel. If Panel, it's trash as not fixable

[Diah]

Lol... when did you know it was 100% panel? We should have stopped at that point, right? Don't get me wrong, I appreciate the help, but I wanted to know if it's TCON Or Panel. If Panel, it's trash as not fixable

i wrote at post #13 99,8% Panel.. are you mad because of 0,1% lol.. and i never suggest to try boards... my wish for you and others i am wrong.

[jason123]

i wrote at post #13 99,8% Panel.. are you mad because of 0,1% lol.. and i never suggest to try boards... my wish for you and others i am wrong.

No, I am not mad at all...again I appreciate the help... but when we got a lit panel and no hot spots on panel when bypassing error detection, I thought we're still hopeful.

[Diah]

No, I am not mad at all...again I appreciate the help... but when we got a lit panel and no hot spots on panel when bypassing error detection, I thought we're still hopeful.

for you and other maybe... on Buffer boards there are COFs and EPROM with VCC 3.3V.. EVSS which we called are belong to EVDD which PSU supply it.. they are running round the panel .. any break or short at cell raw T-CON driver boards will register it as error.. we talked on this before..

Display lit dim white this is first time i saw over OLED.. but it could EPROM damaged or its VCC.. if you try other T-CON and the issue same... don't trash it.. just cut the metal over buffer boards we will fix it.

[Diah]

but you said you never saw white LED at front... the IR section and LED have one light sensor , take look at this boards

[jason123]

but you said you never saw white LED at front... the IR section and LED have one light sensor , take look at this boards

No before we started the troubleshooting the TV would start with White LED then turn to 5 blinking red (2 separate LEDS) not sure what i did, but white no longer turns on now

[Diah]

No before we started the troubleshooting the TV would start with White LED then turn to 5 blinking red (2 separate LEDS) not sure what i did, but white no longer turns on now

by standalone test of course it will not, cause MB disconnected... but by DIY t-CON error pins.. it should lit on specially after the reset you did, check the Kabel as its like ribbon one from both side

[jason123]

I checked the continuity on the cable - seems ok.

[jason123]

you have another 3 EVSS on buffer boards.. compare them then you know why i said panel

So out of curiosity, I measured the voltage across the exposed capacitors on the panel. Help me understand the result. I'm getting almost an exact mirror from the left 2 to the right 2. So if there is a short, I would expect to see something different? What in these results tells you it's a panel problem? Again, just trying to understand your reasoning

[Diah]

its may mean many things, buffer boards ( could be fixed ) or gate Transistor shorted inside the glass (rubbish)

[jason123]

its may mean many things, buffer boards ( could be fixed ) or gate Transistor shorted inside the glass (rubbish)

But not tcon... right?

And what in the reading is telling you something is indeed wrong in the panel? What should the reading be? You said compare and you'll see it's panel. Trying to understand that statement
Thanks

[Davi.p]

Remember when the tcon arrives and if you test the set succesfully, don't close the set''s back, i will explain later

[Diah]

But not tcon... right?

And what in the reading is telling you something is indeed wrong in the panel? What should the reading be? You said compare and you'll see it's panel. Trying to understand that statement
Thanks

before going to answer..i read your first post measurement, so i would like to be sure, if you only the PSU test it as stand alone with out the T-CON and Panel or MB... did the EVDD rail go higher than 18.8V when t-con connected