Comments on: Brandnew Defect VGA to HDMi Video Adapter

By: Alexan Decebal Catalin

Alexan Decebal Catalin — Thu, 04 Dec 2025 14:30:32 +0000

Dear Albert, you should unsolder from pcb of the QFN package, to see if short is gone.

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By: Sam

Sam — Tue, 11 Mar 2025 13:14:24 +0000

Thanks for awesome information. It seem that you have access to datasheet of ZY5621! But I can't download it! This website (https://www.eechina.com/thread-749720-1-1.html) has it but it's asking me to login first using a Chinese phone number! If you have it can you upload it somewhere please so I can download it?
Sorry for my bad English.

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By: Albert van Bemmelen

Albert van Bemmelen — Fri, 01 Mar 2024 16:37:19 +0000

Understood Yogesh, so it sadly was still a different pwm controller. Although your defect 8117 is easily replaced with a new on Aliexpress.

PS: update on the other vga tro hdmi converters that were ordered from here at the ciin store: https://nl.aliexpress.com/item/1005002173117868.html? spm=a2g0o.order_list.order_list_main.32.782f79d29nzDFn&gatewayAdapt=glo2nld

I ordered 2 of thEM and they arrived today on 1 march 2024. And both video converters IMMEDIATELY AND PERFECTLY WORKED!

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By: Yogesh Panchal

Yogesh Panchal — Sun, 25 Feb 2024 16:24:50 +0000

Albert, I checked PWM ICE3AR2280JZ Datasheet it is not what i am looking for.
IC Marked with 8117,i traced Circuit pins are probably like this
1 Soft Start
2 VCC
3 GND
4 FB
5 CS
6 NC
7 & 8 Are directly connected to SMPS Transformer primary second end.

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By: Albert van Bemmelen

Albert van Bemmelen — Tue, 20 Feb 2024 16:08:41 +0000

In reply to Waleed Rishmawi.

The second identical vga2hdmi adapter converter that this time was ordered through Aliexpress instead of Amazon was half the price I paid on Amazon and was afterwards fully refunded Walleed!
It may sounds unbelievable, but that converter was completely dead too!
Only showing the Monitor's screen message "no signal found" after all my perfectly working HDMi monitors simply switched off.

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By: Waleed Rishmawi

Waleed Rishmawi — Tue, 20 Feb 2024 09:06:42 +0000

I can not believe there sellers like that. I never had an issue with amzon but we never know till we face this sometimes in life. they should have refunded the whole amount. sorry you were not able to get it fixed due to not finding the right replacement for a faulty part. thanks for sharing it and thanks for all the information provided. have a blessed day

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By: Parasuraman S

Parasuraman S — Tue, 20 Feb 2024 04:16:57 +0000

In reply to Albert van Bemmelen.

Yes, it happens and we learn a lot from such fall backs!

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By: Albert van Bemmelen

Albert van Bemmelen — Mon, 19 Feb 2024 20:21:04 +0000

In reply to Albert van Bemmelen.

And beside the high temperatures measured, it was a clear fact that here the normally 5V DC input on the USB powering port was also way too low!

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By: Albert van Bemmelen

Albert van Bemmelen — Mon, 19 Feb 2024 15:39:48 +0000

In reply to Parasuraman S.

I already did dear Parasuraman. But completely unexpected also the new ordered identical vga2hdmi adapter wasn't working. So after reading some very bad reviews from other disappointed buyers about this useless crappy product I decided to buy a completely different vga2hdmi converter that got good reviews.
This one: https://nl.aliexpress.com/item/1005002173117868.html?spm=a2g0o.order_list.order_list_main.32.782f79d29nzDFn&gatewayAdapt=glo2nld
that I hope really does work this time!

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By: Albert van Bemmelen

Albert van Bemmelen — Mon, 19 Feb 2024 15:33:41 +0000

In reply to moshe jacobson.

I guess that for instance in some Green WD SSD drives a chip on its pcb gets this hot without cooler attached. And some USB memory sticks - mostly the smaller ones - get real hot instantly too. I can't give you any exact details. I only started checking the temperature of the components in the video converter after I noticed that my brandnew vga2hdmi converter wasn't working.

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