Sony KDL-460EX500 Totally Dead - With Standby

[R_J]

Re: Sony KDL-460EX500 Totally Dead - With Standby

There are two resistors off each gate, R6117/6118 (10Ω) R6111/6112 (10KΩ) R6111/6112 are between gate and source, so if the fets are shorted you can't check the resistors properly.
If the 10Ω resistors are ok likely the rest of components in the gate circuit are ok.

[jason123]

Re: Sony KDL-460EX500 Totally Dead - With Standby

So, replacing the resistor and the 2 FETs as you suggested did the trick. TV has life. However the picture is all messed up.

When I first turned on the TV, it came up to this screen attached. Subsequent on off just back light came on. While it's on with just backlight, I disconnected the LVDS (cable from main to TCON) and reconnected it, and the messed up screen appeared again. TV is upside down in the photo

TCON or Main board?

[jason123]

Re: Sony KDL-460EX500 Totally Dead - With Standby

Any comment in this R_J?

[nomoresonys]

Re: Sony KDL-460EX500 Totally Dead - With Standby

Maybe try a firmware update/reapply thru usb.

[nomoresonys]

Re: Sony KDL-460EX500 Totally Dead - With Standby

I think your model is 46X500: https://www.sony.com/electronics/sup...x500#downloads

[R_J]

Re: Sony KDL-460EX500 Totally Dead - With Standby

Have you tried going into the service menu or into factory mode? Also try changing the picture sapect ratio, [WIDE] key on remote.
This fault does look like it is on the main board and not the t-con

[jason123]

Re: Sony KDL-460EX500 Totally Dead - With Standby

Thanks for the firmware. Updated it, the process worked out, but the result is the same.
I haven't tried getting into service menu - the content on the screen is not really legible to make any sense of it. Just garbage on the screen basically. I tried the aspect ratio - no change

[R_J]

Re: Sony KDL-460EX500 Totally Dead - With Standby

What source are you using and have you tried any other input? if you are using a hdmi source can you try a different resolution?

[nomoresonys]

Re: Sony KDL-460EX500 Totally Dead - With Standby

Maybe try cleaning and resetting the tcon ribbon connectors, not to vigorously they can be delicate and reset lvds cable. If no joy, I would probably throw another mainboard at it if they were reasonable in price.

[nomoresonys]

Re: Sony KDL-460EX500 Totally Dead - With Standby

Looks like the 32, 40 and 46's will work. https://www.shopjimmy.com/sony-1-857-593-31-a-board.htm

[jason123]

Re: Sony KDL-460EX500 Totally Dead - With Standby

New main board took care of the problem. TV is happy again. Thanks for the help.

[nomoresonys]

Re: Sony KDL-460EX500 Totally Dead - With Standby

Nice, thanks for followup.