Sony KD-55XE8505 black screen with sound

[salvatore22]

Hello everyone…I hope someone can help me to figure out…i have a sony tv which the screen is black but i can hear the sound …so I try in another similar tv a t-con , motherboard and all works perfect but in this tv i see only a black screen with illumination…the display is not broken ..so I think the problem is on the buffer board …someone can help me? Thanks in advance

[EazyBone]

Re: Sony KD-55XE8505 black screen with sound

When you say try a similar tv, you mean you replaced the tcon and motherboard with the parts from a 55xe8505 or a different model that was similar?

[salvatore22]

Re: Sony KD-55XE8505 black screen with sound

Thanks for answer to me….the same model of tv …i have two tv the same model…that’s why i can check the components from one tv to other tv ….

[Davi.p]

Re: Sony KD-55XE8505 black screen with sound

the same old defect, probably a bad gate driver, but hope for a bad cap on panel stripe board..

[salvatore22]

Re: Sony KD-55XE8505 black screen with sound

Can you help me to find a solution ?

[Davi.p]

Re: Sony KD-55XE8505 black screen with sound

if you are familiar with multimeter, open the panel stripe board covers and inspect the pcb to find shorts on the caps, or at least low ohms

[salvatore22]

Re: Sony KD-55XE8505 black screen with sound

I have two tv , both are the same model …one works perfect..the other one with black screen …i try to inspect looking the other tv …but seems like they have a same voltage…i try with a tape on flat cable and i see the left side a picture with vertical bars white and black …where is white i can see image…I hear in most of this cases I should remove a diod or I should cut the cvk line …but i don’t know how to find it

[KYBOSH]

Re: Sony KD-55XE8505 black screen with sound

Your issue is likely with the panel or the circuit boards connected to it. You'll have to use a multimeter to find the bad component if the problem is on the panel boards. If its within the panel itself you will need to cut certain traces to eliminate the short.

These things are not for the inexperienced.
You are dealing with VERY small components and very thin/small traces.
One slip or false move and your panel will be inoperable.

Most times when you have panel issues the TV is not worth dealing with.
If you REALLY want to keep/save this TV and the issue is with the panel then take it to a professional who is knowledgeable of this repair. Even among the repair field you'll hardly find someone who will want to take it on. Not profitable, can be tedious and time consuming and it'll likely not be financially wise vs buying a comparable 55" 4K TV these days.

I speak bcos I have been where you are many times.
Ultimately I sacrificed (unwillingly!) them to gaining more experience for the future.

Good luck!

[salvatore22]

Re: Sony KD-55XE8505 black screen with sound

I Wanna thank you all for advice….i just bought a new tv