I have a Sony XBR-65X850D that shows symptoms of a bad mainboard. From what I hear it is a very common issue with these sets and there are repair services on EBay and other sites for the boards. Is anyone aware of the common failures with the main boards? When you plug in the set, the mainboard commands the power supply to wake up, all of the voltages are there but no sound or picture. I verified that there is no picture.
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Re: Sony xbr-65x850d
Does the pilot light turn on at all? If no pilot light, then it does sound like a main board failure.
Try checking out Sony's support page for hard resets linked below:
https://www.sony.com/electronics/sup...icles/00159487
Let us know if this does anything for you or not.
Good luck. -
Re: Sony xbr-65x850d
Thanks Nick,
No standby lights at all, I'm thinking a bad main board as well. I will try the hard reset procedure, thanks.Comment
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Re: Sony xbr-65x850d
Easy test to try, with tv UNPLUGGED, test all the diodes on powerboard, meter set to diode mode, with a probe on each leg of diode, should get a reading around .3xx to around .7xx in one direction then reverse the probes should read 1 or OL if you get voltage in both directions or none at all investigate it further, if any read off de-solder or clip a leg and retest out of circuit, sometimes you will get an off reading because of other things on the circuit.Comment
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