[Solved] How to fix M24E14 M24EI4 power supply board

if it happens again i will be shooting for the external supply method outlined early in the thread.
if you have an ATX supply then might save you 50-75 bux. Plus the guy already did all the research and homework.

Ordered 2 power supplies from Taobao well over 2 months ago, but never received any emails indicating the agent had been able to fulfill my order. I'm not giving up on my Soyo, but I have no way to get the power supply repaired without the parts needed.

Any further info on replacement parts would be greatly appreciated. A buddy of mine who used to do PC and monitor repair as his business has been working on fixing it, but without the PSU he is at a standstill.

recomend you tell him to try the external supply mod described early in the thread.

How does this monitor compare to the current crop of 6-bit eIPS screens? (i.e. is it worth saving)

Quote from Walkintarget : Ordered 2 power supplies from Taobao well over 2 months ago, but never received any emails indicating the agent had been able to fulfill my order. I'm not giving up on my Soyo, but I have no way to get the power supply repaired without the parts needed. Any further info on replacement parts would be greatly appreciated. A buddy of mine who used to do PC and monitor repair as his business has been working on fixing it, but without the PSU he is at a standstill.

Have an identical problem, need to replace or repair M24E14 power supply board inside a Soyo 24" monitor. Just ordered a Long Wall M24E14 v111 on Taobao through a Taobao agent.(Englishtaobao.com) The process is fairly simply. The website is in English. You have to know the model number to search for this item. Different versions are available. The price is in American dollars. Total cost is $37.48 which includes $21.10 for the item and remainder for shipping cost and service fee. This site allows payment with Paypal or American credit cards and you can follow the progress of the process on their website. Even a tracking number for China Post is included in the email. It will take a while before the item arrives in Texas. There is hope for purchasing this PSU in the US from China. Trouble shooting a SMPS without a schematic is obviously problematic.

In the mean time I am trying to trouble shoot the M24E14. My monitor just went dead one day and will not turn on. On close inspection I found a bad 3.25A 250V fuse and a bad 250V 100uf capacitor on the AC input site. Replaced both, but the PSU burned the fuse instantly. Based on some research on SMPS, I continued to look for bad components on the primary side. Further check revealed a shorted FQPF13N50C n-mosfet(13A 500v) and an open diode, 1N5406(3A 250V). They are on order. My ZD1 zener diode and other diodes checked out. But there is a 4 terminal semiconductor attached to the large heat shield needed to be tested out of circuit. But that requires first the removal of a 4 terminal transformer/inductor before you can access the mounting screw. So the process is on going. Will attempt to replace the 1N5406 and 13N50 fet first.

I still have had no luck going thru the EnglishTaobao search for the elusive M24E14. I ordered another two a month ago from a seller that stated he had a quantity of 56. Total bill was $72, but the following day I received an email that my order was canceled.

I quickly learned my lesson and decided to only buy from sellers who had a quantity of ONE, and within a week I ordered another M24E14, this one stated to be for a 26" Soyo but compatible with the 24" panel. Same thing, the next day an email that my order was canceled due to insufficient stock on hand.

So now I sit there with $70+ in 'store credit' for EnglishTaobao, but every order I make continues to fail the following day for insufficient stock. I'm giving it another week and then I'm going to dispute the purchase with Paypal based on them holding my $$ without shipping me a damn thing.

Well, I finally managed to get my Soyo PSU via EnglishTaboao with a little persistence and some friendly SD assistance. After all of that drama, my friend who was doing the PSU swap ended up with damage to the ribbon cable:



This looks like a catastrophic failure, and I cannot find any compatible cable or source for a replacement. Going thru the LCD parts piles, no donor cable is even close to this oddball cable.



I swear to God, this has been the most challenging hardware hunt I have ever encountered, filled with enough dead ends, twists and turns and enough teenager drama to last me a lifetime.

Quote from Walkintarget : Well, I finally managed to get my Soyo PSU via EnglishTaboao with a little persistence and some friendly SD assistance.

Sorry to hear about your painful experience.

What power supply did you order? I was trying to order twice or three times via englishtaobao, taobaogle etc but keep getting "order cancelled" messages.

Thanks!

Quote from Walkintarget : Well, I finally managed to get my Soyo PSU via EnglishTaboao with a little persistence and some friendly SD assistance. After all of that drama, my friend who was doing the PSU swap ended up with damage to the ribbon cable:

could you kindly provide some info on what and from whom you ordered from? also what was total cost, transit time etc.

would anyone with any electical knowledge mind taking a look at pics of my board, i'm not by any means an expert , but the soldiering job is very low quality.

in particular the last two pictures, where on the power out end (opposite side of A/C input socket), the last two pins (7 and 8) are soldiered together. this is on the side that outputs 24V to the inverters i imagine. if it isn't suppose to be touching, can it be that the power supplied heated to the point of softening and they merged? if so would this ruin the psu or the inverters?




Top Right in picture.

Is everyone (like me) still looking for replacement power supplies for this monitor? If so, I'm thinking about just saving us all al lot of trouble with a purchase of a large stack of them. Then I'd put them on eBay or something... at a reasonable price (small markup from total cost to import them).

How many people would buy one or more? I'm going to throw out a ballpark of $45 incl. budget shipping but perhaps less if it works out well.

-Paul

Quote from mike0119 : would anyone with any electical knowledge mind taking a look at pics of my board, i'm not by any means an expert , but the soldiering job is very low quality. in particular the last two pictures, where on the power out end (opposite side of A/C input socket), the last two pins (7 and 8) are soldiered together. this is on the side that outputs 24V to the inverters i imagine. if it isn't suppose to be touching, can it be that the power supplied heated to the point of softening and they merged? if so would this ruin the psu or the inverters? Top Right in picture.

Soldering is okay. That is not a problem that 2 pins are soldered together. If you would like then get electronical equipment to find the problem. This tread has very good advices to get you started.

Quote from Walkintarget : Well, I finally managed to get my Soyo PSU via EnglishTaboao with a little persistence and some friendly SD assistance. After all of that drama, my friend who was doing the PSU swap ended up with damage to the ribbon cable: This looks like a catastrophic failure, and I cannot find any compatible cable or source for a replacement. Going thru the LCD parts piles, no donor cable is even close to this oddball cable. I swear to God, this has been the most challenging hardware hunt I have ever encountered, filled with enough dead ends, twists and turns and enough teenager drama to last me a lifetime.

It is not a big deal that she damaged the FFC (flat flex cable). It can be fixed by soldering with tiny wires. Microscope would help.

Quote from MaileK : Is everyone (like me) still looking for replacement power supplies for this monitor? If so, I'm thinking about just saving us all al lot of trouble with a purchase of a large stack of them. Then I'd put them on eBay or something... at a reasonable price (small markup from total cost to import them). How many people would buy one or more? I'm going to throw out a ballpark of $45 incl. budget shipping but perhaps less if it works out well. -Paul

I would buy one. My monitor died this morning. I opened it up and ZD1 and some resistors were scorched. Funny how I came to this site first looking for a deal on a new monitor and turns out it's a great site for tech support too.

To all those interested in repairing their Soyo monitor:

I wrote up these instructions for how I was able to replace the original power supply with a different power supply (originally intended for a different make and model of display) that is somewhat easier to find without resorting to taobao.

Now that I've fixed my own monitors, I'm placing this info in the public domain to help keep these great monitors out of the landfill.

Some soldering and mechanical skill is required.. this is not a "plug and play" modification. Expect to spend 2-4 hours on this repair. You need metal cutting shears (or a hacksaw and some patience), a metal file, a soldering iron, a hammer, drill, and various other tools listed in the instructions.

The end result is worth it, though- a great monitor that works reliably, with the new power supply contained entirely inside the original plastic shell.

Enjoy.