Sony XBR-65X930D No screen

[yankys]

Re: Sony XBR-65X930D No screen

Let me check and ill post my findings. One question can 12v be supplied to the fuse just to see if it will come or will do more damage?

[nomoresonys]

Re: Sony XBR-65X930D No screen

yes I have done the checks all seems good just not getting 12v at the fuse on t-con board, if you unplug the tv and plug it back in you have the amber green light on bottom of tv. then if you push the power button on remote you can get the white stand light but no picture. but each time its unplugged and plugged back in same thing over again.

I had this same symptom on my xbr65x900c, always with the amber/green, then settle on white, would not take update no matter how I tried, got the spa music but never a picture or backlight, white light would blink with remote button press, haven't messed with it lately, I think it's a bad/dead emmc chip on mainboard, suspected that early and some other members thought the same.

[yankys]

Re: Sony XBR-65X930D No screen

That may be it let me do a few more checks and I’ll. Post what find.

[nomoresonys]

Re: Sony XBR-65X930D No screen

it does seem a little strange that all 3 boards would be bad tho, it may be something else but I don't know what it is.

[nomoresonys]

Re: Sony XBR-65X930D No screen

check second link down, post #29, see if that dps board is sending proper voltage to the mainboard if you have not.

[yankys]

Re: Sony XBR-65X930D No screen

I will re-check those voltages when I get home and post my results thank you for all your help.

[Davi.p]

Re: Sony XBR-65X930D No screen

On the led driver board (it does not only that) there are 2 coils in series, grey big square, i've read a problem in those coils in another thread, check their resistances

[yankys]

Re: Sony XBR-65X930D No screen

I rechecked the DPS volts and picture is the finding on each pin not sure if the voltage is correct and all there. Number 4 is 0

[yankys]

Re: Sony XBR-65X930D No screen

.

[nomoresonys]

Re: Sony XBR-65X930D No screen

admittedly hard to decipher this, much harder with no obvious voltage legend on the dps board, I might be tempted to throw another dps board at it if they are reasonably priced. I wish I would have tried that before I fried my mainboard with overheating, might want to fully test the dps board first, I don't have enough dealing with them to know much about them but I bet some of these guys do.

[zomi]

Re: Sony XBR-65X930D No screen

been working on a couple of these myself this weekend.

If it turns on, your dps is fine

the cables that go from the dps to the tcon

examine them check for any damage they are easy to damage.

also on these if you power up without the tcon conencted up u end up with amber green lights flashing..

when that happens just let it power on then connect usb and leave it for hour or so ..
it mostly updates fine..

some times if it on blinking white connect the usb then it starts the update..
some time it takes longer..

when update dated it should respond to the remote.. power on and off etc..
also try menu commands to see if you have sound.

v unlikely u have 3 dead boards..

[zomi]

Re: Sony XBR-65X930D No screen

On the red side you have 24v

on the blue side 3v with a good dps.

I disconnected the dps cables to the tcon and set will then flash red green

but on the tcon you should still have 12v.

[zomi]

Re: Sony XBR-65X930D No screen

Check the led driver board as advised by davi.p

you should have 12v going from the led board to the tcon.

if you don't you have some issue there ..

[nomoresonys]

Re: Sony XBR-65X930D No screen

I think these xbr-x900 series are some of the worst lemons sony has come out with, there has to be a common fault on these but I have not been able to figure it out, symptom always seems to be the same, andriod music, no picture no backlight, very low voltage at the tcon fuse, like 1 volt or less. Sometimes there is backlight but no picture and usually the amber/green blinking and doesn't seem to take an update no matter how you try it.

[nomoresonys]

Re: Sony XBR-65X930D No screen

here's my thread on a xbr-65x900c piece of crap, no history available, worked fine for 3 days then just stopped, seems to be a ton of these with the same symptoms: https://www.badcaps.net/forum/showthread.php?t=102548

[nomoresonys]

Re: Sony XBR-65X930D No screen

I bet BudM could have figured this puzzle out.

[zomi]

Re: Sony XBR-65X930D No screen

Any progress on this

[yankys]

Re: Sony XBR-65X930D No screen

No I'm still having the same issues couple of different mother boards and DPS Boards

[zomi]

Re: Sony XBR-65X930D No screen

Does it respond to the remote
turn on and off..

I just had this problem on one.
it turned out to be the flat cable coming from the led driver board to the dps board wasnt inserted correctly
might be worth a check

[yankys]

Re: Sony XBR-65X930D No screen

HI, everyone I have good news! I have the XBR-65x930D working, you won't believe how, it seems the firmware needs no bigger than a 4g flash drive, when I put it on a 4g the firmware updated now the tv is like new no issues at all. hope this helps someone with the same issue I was having.