I just connected the main board A1727318A to Sony tv KDL-32XBR9

Question edited for clarity and spelling 'board' - 'different'.

If the board number is the same, yes you can use it. The likely issue is whether the board is new or taken from a scrapped set and whether it is returnable.

https://www.fixya.com/support/r29790007-repairing_own_television

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dear
when we replace main board or panel in these modals software must up date other wise green and umber light blinked
please up date the software
thanks
M Nasir

check the voltages at pins leaving power board some have the sound pins printed on. if ok then check connection board. theres also a little pcb board attached to speakers. the red whit i think are sound leads to speakers. or speakers blown, check resistance

hi 7 red flashes- main board over heating, can be short on power board or main logic board, thanks

shaun

6 red flashes- backlight issue, bad main board, or power board or inverter boards- check standby volts on power board. "backlight on" volts should be 3-5v from main logic board then 24v to inverter


Have this from a youtube link find BUT
Better is to look first also on bad leaking or bulged capacitors thats better to replace in the bad components to get a repair because active components died on bad capacitors but after a while because on the build-in protection circuit by faults like deformed or leaking capacitors and even several fuse resistors then after replace a complete board again after a while you will may be get the same kind of problems again, take If you find some or much bad capacitors replacements 10 volts dc higher . begin with control on the power supply first of all.



Sony Bravia TV kdl red blinking led light error codes solutions Sony KDL 40XBR4 KDL 40XBR5 KDL 46XBR4 KDL 46XBR5 Service Manual

Tries tv unplug,replug it back about an hour later for the tv for a resetting back to the factory setting.Go into the tv menu go to Audio Setting go down to do a resetting back to factory setting.These steps will help the tv to get the tv audio back.

That symptom may cause by the main board or t-con board, I suggest you do software up grade first.

HI
IT SEAMES THAT YOUR LED MAIN BOARD IS DEFECTIVR SO PLEASE REPLACE MAIN BOARD
THANKS
M NASIRR

Most likely this is caused by a defective main board. Changing the main board will fix the issue about 95% of the time.

To be absolutely sure, the voltages need to be checked on the power supply. If they are not the values listed in the service manual, then you should replace the power supply instead (accounts for the other 5% of the time).

Replaced circuit board under warranty.