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post #11 of 13 (permalink) Old 01-02-2019, 05:04 PM
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Originally Posted by spearoid View Post
I'm guessing this reply may come too late but I'll take a look when I get home and try to send a pic

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Thank you @spearoid. I couldn't find the relay, but I found a fuse labelled as BOSE amp in the main box under the bonnet. Remarkably, it was the culprit, at least in my case. While looking for the relay I found the fuse and noticed the whole box was very dusty. I realised the contacts might have corroded, so I decided to clean them. Since all other electronics on the car worked well, I chose to clean just the amp fuse and its socket. And it worked! Cloth and contact spray did it. That's all. The amp didn't start right away, but next morning it turned on and has worked without a fault for a few months now.

In short and for the posterity, BOSE amplified intermittent operation (not working sometimes) problem could possibly be solved by cleaning pins of the amp fuse and the socket in the fuse box under the bonnet.

Please don't forget to disconnect the battery while doing this and good luck.
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post #12 of 13 (permalink) Old 02-07-2019, 08:09 PM
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I have Found a fix for this issue!

I was digging around in forums all over the world and a particular one in eastern europe had all the answers, i have since tried it successfully fixing the issue for under $100 AUD

The issue lies within the Stabilizer, Digital Signal Processor or the Integrated Circuit(?) components of the computer board inside the amplifier under the seat Each of these cost around USD$5 (+$5 postage) from Aliexpress…
You then will likely need someone skilled with microsoldering computer chips. I used a local iPhone repairer who did it for $75.

See (attached) components towards the back of the chip, black squares, labelled CS42438 (circuit), DSPB56374AE (digital signal processor) and STL05-3300 (stabiliser).
These are relevant for model GS1E 66 920A, I had a different model amp with a different DSP but the other two were the same.

The first thing you will need to do is take out the amp and open it up (need a T(10?) screwdriver) and have a look at the chip, get some good light and a magnifying glass and have a look at the numbers and letters written on the parts. There are some other numbers written underneath but they are irrelevant. Then head over to Aliexpress (don’t know where else) and search for each part. Mine took about 2 weeks to send to Aus.
Had these changed over by my guy and sound has worked perfectly since!
Happy days. Please let me know if you have any questions!
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post #13 of 13 (permalink) Old 02-08-2019, 10:11 AM
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Thank you for updating the thread. This will surely be useful someday.

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