Comments on: Using Standard LED Power Adapter To Replace And Fix Old CFL TV Backlight Problem

By: Lynn Blakely

Lynn Blakely — Sun, 02 Oct 2022 22:52:24 +0000

Albert Thanks for the excellent repair, and enjoyed reading all the comments. Very well written article.

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By: Albert van Bemmelen

Albert van Bemmelen — Fri, 30 Sep 2022 16:59:55 +0000

addendum: I today found which led powermodule went up in smoke after just minutes of use at the right input voltage on my previous Aliexpress account! Here is the link to the included two 27 inch ledstrips that I re-used in shorter 20 inch (45cm) length for the repair in above article.

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By: Albert van Bemmelen

Albert van Bemmelen — Thu, 29 Sep 2022 05:17:58 +0000

In reply to Parasuraman S.

I know Parasuraman, already did that several times in the past with the included calibration capacitor and the shorting leads but the thing is that it asks it again even after just changing the batteries. Which was the reason why I called it annoying. Also I already blew the avr processor on 2 of these identical digital meters by just measuring on a small e-cap capacitor that was still charged. Luckily I was able to program 2 new processors with the online found firmware to replace the avr mcu's and got both digital tester back working like new. So if you ever need the firmware bin file I have that too.

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By: Parasuraman S

Parasuraman S — Wed, 28 Sep 2022 14:42:52 +0000

My transistor tester probably is bit out of tune because it keeps nagging that I need to calibrate the device again :- Long press test, select self-test, short all the three leads and press test. It will become ok. After the process, it will show, remove probes. There is an instruction manual for it in pdf format. Kindly search for it.

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By: Albert van Bemmelen

Albert van Bemmelen — Mon, 26 Sep 2022 19:36:45 +0000

In reply to Yogesh Panchal.

Understood Yogesh. I know also Parasuraman was successful in using those too. But my previous used stepdown led power module had no coolerblock or fan and was supposed to power my longer ledstrips for another monitor. But became instantly hot and in a minute of 10 or more went up in smoke! So I have very little hope in using such modules to replace old cfl tubes again. It was promised to work up to 30V DC input voltages for my led strips but destroyed itself already at lower voltages around 20V DC. I tried to look up the useless module I had used to show it, but it probably no longer exists and was apparently also deleted from my order history list.

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By: Yogesh Panchal

Yogesh Panchal — Mon, 26 Sep 2022 13:00:40 +0000

Albert,
Good Modification!
BL-ON /Enable signal is the main reason for your Back light is still active ON after switched off because you have connected power module Direct to 220V.Most of Universal CCFL inverters are comes with 12 to 24 V Operating Voltage & available for Different size of the Screen.Replaced many none of them failure yet.

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By: Albert van Bemmelen

Albert van Bemmelen — Sun, 25 Sep 2022 14:55:40 +0000

In reply to Parasuraman S.

I know Parasuraman because I had a very bad experience with this completely overheated money worthless inverter.

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By: Albert van Bemmelen

Albert van Bemmelen — Sun, 25 Sep 2022 14:49:28 +0000

In reply to Arun Kumar.

Sure Arun! Here is the link to version 2 of this monitor vga tester:

http://www.tvgenerator.narod.ru/vga_tester.htm

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By: Arun Kumar

Arun Kumar — Sun, 25 Sep 2022 09:26:13 +0000

In reply to Waleed Rishmawi.

Superb Sir,
Great job
Can you share the circuit diagram of the VGA tester.
Just enjoyed your article.
Thanks for sharing the experience

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By: Parasuraman S

Parasuraman S — Sun, 25 Sep 2022 09:23:36 +0000

In reply to Albert van Bemmelen.

Inverter boards are available in the market with power on or enable control. Please try that.

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