Play 3 Powersupply fault.

Upon investigation I find that the date code for my sisters PSU board is identical to the one for Jamie who previously reported this problem. Same burnt piece of pcb too.
C'mon guys we weren't born yesterday and some of us have sufficient knowledge of electronics reliability to recognise a common mode failure.

I now have exactly the same problem with exactly the same place burnt out on my board as the drop box pictures by Jamie and the same board number no coincidence I feel!! Board date 08-04-11
By replacing the pot was everything ok as it looks like some of the PCB blown too ?Why cant Sonos provide a complete board change as an electrician I am always doing component changes on boards. Can anyone assist with a new board?

Hi Wiggy, this hardly surprises me. I am a specialist reliability electronics engineer and I recognise common mode failures when I see them. Manufacturers usually want to avoid liability issues so they tend to simply deny everything, as we have seen here. Most of us want to just get our products going again, not pursue litigation.
SONOS adopt a policy of not supporting third party repairs so they do not currently supply replacement boards, but if enough of us complain they might just listen, or least provide circuit diagrams so that we can see what needs to be replaced. Are you reading this SONOS?
My board is so badly burnt that the inter layer tracks have burnt out so replacing the capacitor didn't do the trick, I have been to busy to investigate further, but will be interested in yours or anyone else's experiences!

I picked up a faulty play 3 for a tenner the other day. Heck of a deal.
Cracked it open and turns out I have the same power board revision as what jamietaylor13 posted except my capacitors were fine.
Turns out the digital power switch literally blew its guts out. Likely through a power surge. I heard rattling as I was dissasembling and it was the top of the chip exploring it's new-found freedom inside the unit. Fortunately the chip number was still visible on the little cap bouncing around.
It was a Fairchild Green Mode Power Switch model number FSQ0565R but none can be had outside of 1 month shipping from China so I found the next model up FSQ0765R which is pretty much the same except a little beefier with power handling. Ordered one off fleabay for 6 quid and arrived next day. Today I soldered that bad boy in and still had no power so I had to start tracing back the power source and found that the fuse had also blown. It's the tiny little brown cylinder near where the 240AC enters the PCB. I soldered a temporary bridge (yes, I know, leave me alone) and woila! working!
Anyway, I thought my experience may be of help to someone else out there.

Good that some DIYers' could fix the above problems. I did something similar once in the days when computer motherboards had components tat wern't surface-mounted. I dgress though. My point is that the "expensive" look- at costs are not that. Sonos REPLACES your gear for that price. I had a 6 year old ZP100 die and received a new Connect for a fraction of the new prcie OK so I lost 2 ethernet ports but I still only use one. So I am I grumbling? No Way! I could not be happier with SONOS support. I later bought 2x Play1s' Which I thought sounded great the hearing of the EU price hikes bought a Sub. Now I am over the moon. And no I dont't need a headphone socket on my gear.

jamietaylor13's fix worked in my sonos play 3.
Replace the exploded cap and wire the + lead of the bridge-rectifier to the + of the replaced capacitor.
Works perfectly

Here is another guy that was able to repair a play 3 with jamietaylor13`s fix.
My play 3 died under penetrating smell.....

After opening I saw that capacitor (C306) was exploded and cracked the conducting paths around.
I unsoldered C306 and bridged the + lead from C319 to the + lead of the bridge-rectifier and measured power at the connector to the motherboard.

So I ordered and replaced all three capacitors wired the bridge rectifier to C306 and my unit is working again.

Thanks a lot for this guide and especially for the pictures and the wiring diagram in your dropbox!

Is there a problem with a batch of Play:3's as mine has just stopped working., It has that distinctive burnt electronics smell wafting from within.. I have a support call open with SONOS so I shall await their response before cracking it open and trying to repair.

I wonder, should they issue some kind of recall as there could potentially be a fire risk to one of these units?

I doubt that there is any fire hazard. A small part can emit quite a stench when stressed, but not present any significant hazard to life or property.

It seems that this is a failure mode of PLAY:3, but here we have no idea how many have failed in this manner. It is possible that all of the failures have been reported here or only a fraction. We simply don't know. We also don't know if there are contributing factors to consider -- such as ambient temperature, power line voltage, hours of use, orientation, etc.

well after being quoted a large amount just to look at it (out of warranty) I have opened up and checked. I am very competent with electronics and repair although the more modern the electronics the more tricky this can be. The exact same capacitor blew on mine C306 , same burn marks everything. It has burnt it's way through the board too so I'm sorry there is a definitive risk of fire hazard there. Considering we're advised to leave the devices running in the manual I don't think this can be right. Even if it's a bad batch with the same capacitors used. My part number for the PSU is RN-002657 Dated 08-04-11. I will be checking my second Play:3 to see if I can prevent the issue there.