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[Solved] How to fix M24E14 M24EI4 power supply board

qwe1234 576 November 10, 2009 at 11:25 PM
My Soyo 24 monitor that I bought last year at a geeks deal has just died on me today.
Its internal power supply, which most likely is a problem, M24E14 great wall, is nowhere seems to be found but the taobao.com web site.
The zener ZD1 has burned out therefore likely some other components dead too.
Solved by substitution a USA made generic PSU that has required voltage.
Quote from bizcards View Post :
I replaced (adapted) the ZD1 with an axial 30V 1 watt zener diode (to prevent overheating) and it worked like a charm, just watch out for polarity when replacing it. I also replaced a couple of bulked top caps under one of the heatsink.

I hope this will help you as well

Regards

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Original Poster
#526
Quote from harbin View Post :
yes, I did see the monitor lights up. Just no image from the computer.
Do you see the image from the monitor menus?
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#527
Quote from qwe1234 View Post :
Do you see the image from the monitor menus?
no, I didn't see the menu when pressing the buttons on the side of the monitor.
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#528
Quote from harbin View Post :
no, I didn't see the menu when pressing the buttons on the side of the monitor.
than most likely you repair the cable wrong - test it again and post good pictures for us to check, if not sure
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#529
Hey, isn't this the replacement Power Supply?
http://en.agreetao.com/taobao/vie...5052952753
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#530
Quote from Tecknowolf View Post :
Hey, isn't this the replacement Power Supply?
http://en.agreetao.com/taobao/vie...5052952753
yes. it is.
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#531
OK, I ordered one, says 10-15 days. I will let you know when I get it and if and how well it works.
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#532
Hhm , think I'll grab one of those psu as a backup in Technowolf's link . http://en.agreetao.com/taobao/vie...5052952753

What's the best way to have it shipped , cheaper the better , or go DHL (to avoid damage , etc) ?

*keep in mind my Soyo is still working , but has had the orginal psu replaced with another original psu (family member had cracked a screen on a second Soyo unit ) ; so its not imperative to get a backup right away .


1.) Singapore post mail : $6.20


2.) EMS : $22


3.) DHL : $28




Tia , Wink
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Original Poster
#533
Quote from stereo55 View Post :
Hhm , think I'll grab one of those psu as a backup in Technowolf's link . http://en.agreetao.com/taobao/vie...5052952753

What's the best way to have it shipped , cheaper the better , or go DHL (to avoid damage , etc) ?

*keep in mind my Soyo is still working , but has had the orginal psu replaced with another original psu (family member had cracked a screen on a second Soyo unit ) ; so its not imperative to get a backup right away .


1.) Singapore post mail : $6.20


2.) EMS : $22


3.) DHL : $28




Tia , Wink
Singapore post mail : $6.20 means USPS go for it.
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Original Poster
#534
Quote from Tecknowolf View Post :
OK, I ordered one, says 10-15 days. I will let you know when I get it and if and how well it works.
Be very careful with the correct matching the connectors. There are posts in this tread with the pin outs. You might need to change the order of the wires.
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#535
Quote from qwe1234 View Post :
Singapore post mail : $6.20 means USPS go for it.
Thanks for the info .

At $15.41 it was too good to pass up even though its not needed atm .

Anything I should know about this current offered psu that hooks up differently in anyway ? Quess I'll just keep my eye on this thread for that possible info ... Smilie
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#536
Update, still no statement of item being shipped. I will have to send an email. If anyone else does get an email please let me know. Maybe I need to check my spam filter.
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#537
I have the monitor and it had performed mostly flawless since late '07. 2 years ago I fixed it for bad caps and it was OK until last night when it blew again.

No power light at all, fuse was blown. Also the large cap by the mains plug looks like it's 3 weeks overdue to pop a baby and based on the quick research, when that particular cap is going bad and fuse blows, usually at least 2 or 3 other components on the mains side are bad or about to go bad. I decided not to fix this power supply. Beside desoldering and removing the big shield is a pain in the butt.

I've decided to try and cook up a custom replacement. There are generic 24v power supply on Amazon and eBay for use with other LCD monitors or laptops. The one I just ordered has 2.7A rating, which should be more than enough as I leave my monitor at about 30% brightness and never used the onboard sound.

My plan is to add in a pair of DC-DC converter to run off the 24v mains to provide 5v and 12v for the monitor. The DC-DC converters and the wiring would be inside the monitor, a metal plate to cover the original AC plug hole, a power jack mounted on the new plate, and leave the generic 24v power supply outside. 2 problems solved this way: less heat inside and if it blows again I won't need to take it apart.

I still have to wait for them to show up but the total so far including shipping is about $25. It won't be "original" anymore but it'll keep working for a few more years as I still haven't found any new monitor that looks good and still costs less than my first born.

Prelim schematic: http://i126.photobucket.com/album...b51364.jpg
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Original Poster
#538
Quote from wilykat View Post :
I have the monitor and it had performed mostly flawless since late '07. 2 years ago I fixed it for bad caps and it was OK until last night when it blew again.

No power light at all, fuse was blown. Also the large cap by the mains plug looks like it's 3 weeks overdue to pop a baby and based on the quick research, when that particular cap is going bad and fuse blows, usually at least 2 or 3 other components on the mains side are bad or about to go bad. I decided not to fix this power supply. Beside desoldering and removing the big shield is a pain in the butt.

I've decided to try and cook up a custom replacement. There are generic 24v power supply on Amazon and eBay for use with other LCD monitors or laptops. The one I just ordered has 2.7A rating, which should be more than enough as I leave my monitor at about 30% brightness and never used the onboard sound.

My plan is to add in a pair of DC-DC converter to run off the 24v mains to provide 5v and 12v for the monitor. The DC-DC converters and the wiring would be inside the monitor, a metal plate to cover the original AC plug hole, a power jack mounted on the new plate, and leave the generic 24v power supply outside. 2 problems solved this way: less heat inside and if it blows again I won't need to take it apart.

I still have to wait for them to show up but the total so far including shipping is about $25. It won't be "original" anymore but it'll keep working for a few more years as I still haven't found any new monitor that looks good and still costs less than my first born.

Prelim schematic: http://i126.photobucket.com/album...b51364.jpg
A very good project. The picture is just basic thought, is it a student assignment? You might consider changing the CCFLs to LEDs instead, as the lamps tend to wear out with the years and ebay should have the kits to do so. Then, you do not need the 24 V and the CCFL invertors all together.
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#539
Quote from stereo55 View Post :
Thanks for the info .

At $15.41 it was too good to pass up even though its not needed atm .

Anything I should know about this current offered psu that hooks up differently in anyway ? Quess I'll just keep my eye on this thread for that possible info ... Smilie
Btw , since my order had been placed , I was contacted by the seller (about a day later) and asked for another $4.80 to ship as the weight posted was incorrect . HHmm, did not like it but still did it . Thought I'd inform others about the increase in shipping .

I also just checked my order today and its still has not shipped , but figure maybe in another week ??.
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#540
Quote from Tecknowolf View Post :
Update, still no statement of item being shipped. I will have to send an email. If anyone else does get an email please let me know. Maybe I need to check my spam filter.
today, 3-12-2014 I got my power supply, I will let you all know how it goes when I install it
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