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Moderator
Posts: 262
Registered: ‎03-10-2014
Message 21 of 27 (591 Views)

Re: HT-ST9 Soundbar Dead

[ Edited ]

Hello LordKiRon,

 

Thank you very much for your detailed information.  Some details you provided support a current theory for this root cause of this issue.  In this case, your connection to design is very short, I work directly with them to identify and resolve market issues that we are able to replicate, which is why determining the root cause is so important.

 

Hello everyone else,

I understand your frustation concerning your product and I appreicate everyone's help.  Anyone else that can confirm the connection information will be able to better support our theory and findings.  After I am able, I'll provide more information to everyone.

 

Thank you,

Chris

 

 

Enthusiast
Posts: 11
Registered: ‎06-08-2016
Message 22 of 27 (586 Views)

Re: HT-ST9 Soundbar Dead

[ Edited ]

Thanks, it would be nice to hear what is it your theory Smiley Wink

If you say that according to your theory connecting sound bar to my new Samsung UE65MU9000 TV , while keeping Solo 4K streamer will help avoid the problem I might consider to repair it once more, after all it's a good soundbar .. when it works Smiley Sad

 

Personally I can think of 3 "theories":

 

1. Power spikes burn something in microcontroller

2. Wrong/unsupported HDMI signaling burn something in microcontroller Smiley Happy (especially ARC is under suspicion)

3. TV send to soundbar's HDMI EPROM some handshake/calibration data that "confuses" the software, triggering some bug creating all this "please wait"  behavior. However this should be cleared with firmware reset, unless this is another bug.

Enthusiast
Posts: 11
Registered: ‎06-08-2016
Message 23 of 27 (403 Views)

Re: HT-ST9 Soundbar Dead

After getting a new main board (4th Man Sad) , did some comparason and saw a reason of the problem.

All 3 defective boards looks like this:

 


 

20171113_23130020171113_231125

 

This are images of 2 different defective boards, did not shoot 3rd but it looks the same.

 

Notice the "blackness" on the smaller  (right) chip? Well it's not a out of focus photos, its really looks this way , blacked and printing can't be read.

On new board I just got the chip markings looks clear and without black "aura".

According to the service manual I found on the net, it's a IC2001 chip , which is ... NAND Flash.

So this is consistant with my observations , the failed devices behaved in such way as they could not read or sometimes write flash.

So I am not sure if a NAND flash in Sony soundbars is defective so it burns out so quickly and ofter or some other defect on main board burns it, but this is clearly direct couse of "Please wait", not able to update firmware , not saving some settings etc. issues.

Rookie
Posts: 3
Registered: ‎12-12-2017
Message 24 of 27 (247 Views)

Re: HT-ST9 Soundbar Dead

I downloaded the manual for repair. Is it difficult to change the MB1406? Could you do a YouTube repair video? I wasted 1500.00 USD on this ht-st9. I'm out of warranty. Sony pretty much told me good luck. Never buying Sony Again. At any rate, I'm going to attempt to repair. Let me know how doable.
Rookie
Posts: 3
Registered: ‎12-12-2017
Message 25 of 27 (246 Views)

Re: HT-ST9 Soundbar Dead

I guess my only concern is the software after I connect everything in place.
Enthusiast
Posts: 11
Registered: ‎06-08-2016
Message 26 of 27 (242 Views)

Re: HT-ST9 Soundbar Dead

Well, if you have tech. manual it isn't that hard, the main problem is not to misplace stuff when putting it back. Just fallow all the steps in manual one by one, keep all parts you remove placed on table or whatever clearly marked as from which step they are.
Don't skip the steps, especially last, but you not really need to remove cousions, just peel them off a bit.
As software concerns, the board comes with some older version preloaded, so you just need to burn in the wifi and Bluetooth address just as manual says and then you can update to newer version regular way, either by USB or internet, after you setup anew.
One thing to comment is that last time i got revision B of the main board, all previous times it was revision A, so I hope they fixed something there.
Rookie
Posts: 3
Registered: ‎12-12-2017
Message 27 of 27 (234 Views)

Re: HT-ST9 Soundbar Dead

Thank you for the information.

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