Comments on: Sayona Woofer Model SHT-1221BT – No Output From All Channels, But Display Present, Now Repaired.

By: Gilbert Rutoh

Gilbert Rutoh — Thu, 18 Jun 2026 05:58:15 +0000

I have this sayona again,the 9v supply is ok , test output pin you hear Humming sound input signal ok but no output sounds

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By: Joshua Oloo

Joshua Oloo — Thu, 18 Sep 2025 10:43:08 +0000

In reply to Kevin Davison.

Thanks for sharing the article, precise and informative. Thanks Hump.

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By: Humphrey Kimathi

Humphrey Kimathi — Wed, 10 Sep 2025 17:23:00 +0000

In reply to Yogesh Panchal.

Thank you so much! You’re absolutely right—customer statements can guide us, but nothing replaces doing our own testing. Laptops especially can be unpredictable, and I’ve also seen how new faults may show up during repair. That’s why I fully agree with you—systematic and reverse diagnosis is the best way to get to the real cause.

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By: Yogesh Panchal

Yogesh Panchal — Wed, 10 Sep 2025 08:58:11 +0000

Good Job! Sir
I learnt not to rely on any customer statement on fault of the equipment until you personally experience and never prior commit. i have very bad experience while handling Laptops for repair.where argument is start from "it was working fine before i handed over to you" as laptop repair is Not predictable, any fault can occur any time when troubleshooting because of complicated circuit.
Reversal diagnosis is good method for fault finding which you applied here.

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By: Humphrey Kimathi

Humphrey Kimathi — Mon, 08 Sep 2025 08:08:51 +0000

In reply to Nazir.

Thanks and welcome, my friend,

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By: Nazir

Nazir — Mon, 08 Sep 2025 06:38:05 +0000

GOOD FAULT TRACING kIMATHI

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By: Humphrey Kimathi

Humphrey Kimathi — Mon, 08 Sep 2025 06:04:58 +0000

In reply to Muykit.

Thank you so much for the kind words! Don’t underestimate yourself—repair skills come with patience, consistent practice, and a willingness to learn from each case. I also started small and kept improving step by step. With dedication, you’ll soon be handling even the toughest repairs confidently. I really appreciate your encouragement, my friend! I will be looking for you at the top.

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By: Humphrey Kimathi

Humphrey Kimathi — Mon, 08 Sep 2025 06:00:25 +0000

In reply to Michael Gallegos.

Thank you very much for the encouragement! Unfortunately, I did not have a schematic for this particular unit. I had to rely on tracing the circuit manually—following the power rails and audio signal path step by step until I located the faults. Having a schematic would definitely have made things faster, but careful observation and systematic testing worked out well in this case.

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By: Humphrey Kimathi

Humphrey Kimathi — Mon, 08 Sep 2025 05:58:06 +0000

In reply to Imoudu O.

Thank you so much for the kind words, my friend! Troubleshooting is a skill that gets sharper with every case you handle. Just keep practicing, be patient with the process, and always follow the signal and power path step by step. With time, you’ll gain the confidence and experience to handle even the toughest faults. I’m glad my post could be of help, and I look forward to learning and sharing together.

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By: Humphrey Kimathi

Humphrey Kimathi — Mon, 08 Sep 2025 05:55:39 +0000

In reply to Mark J.

Thank you so much! I truly appreciate the encouragement. Every repair is a learning opportunity, and I’m glad this one was successful.

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