Re: Samsung Syncmaster 205bw, blink of death
Yes just the A81SC chip is what I replaced. Only one of them. I had one leg de-soldered from the board on the old chip so it would function properly (without saving user configuration of course). Now it saves user configuration fine.
Basically all I did was replace all the capacitors in the monitor with electrolytic ones with the highest MTBF specification from Digikey except for the really big one and replaced the A81SC and everything works properly.
Also the number of hours this monitor has been in operation...
rooket_1000farads
ROHS Compliant
Last Activity: 11-29-2014, 04:28 PM
Joined: 10-15-2010
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Re: Samsung Syncmaster 205bw, blink of death
I got the chips in yesterday and replaced the chip on the controller board and now I'm using a monitor that functions as brand new.
Thanks for the help with the capacitors and with locating the samsung microchip. This monitor project is complete now and fully functioning.
Of course, the monitor sitting behind this one is a 2333 which is a better monitor. But this SyncMaster 205bw was free. I'm into it about $12 for parts now I think.Leave a comment:
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Re: Samsung Syncmaster 205bw, blink of death
Update, A81SC chip I'm going to replace it when I get my shipment. Yes this project has been sitting for 4 years. Monitor still works though.Leave a comment:
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Re: Samsung Syncmaster 225BW
ok well in that case, I'll skip that one and I'm thinking that my VCC on NVRAM is getting too much power possibly so I have to look up a data sheet on the chip and test it on the board with a fluke and also see what the internal resistance of the IC is and match up a resistor to it I guess. it's all fun stuff when the monitor completely works like this one does still. I turned it on a couple times today and no issues once again. it's great. and I'm glad this forum exists otherwise I wouldn't have been able to repair it....Leave a comment:
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Re: Samsung Syncmaster 225BW
Well the first issue was that the monitor would not always turn on. Then when I got it to turn on, it'd display in red. After I replaced all the caps, it would always turn on but would do random things such as display in red or blue or it would display the menus in German.
So now I have that NVRAM chip VCC pin #8 removed from the board and all works fine. Of course, the user settings always get reset but that does not bother me a slight bit.
However I am considering repairing that feature as well just for the hell of it....Leave a comment:
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Re: Samsung Syncmaster 225BW
PlainBill, I have a question for you. When is it ever time to replace the 450V capacitor? This is the only capacitor on the whole board I haven't replaced and it is made by CapXion. Is it a good idea or a bad idea to replace this? It probably only costs a couple or few bucks. Oh and by the way the monitor works fine now, this is just a preventative question.
Thanks in advance....Last edited by rooket_1000farads; 10-30-2010, 07:27 PM.Leave a comment:
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Re: Samsung Syncmaster 205bw, blink of death
Edit: I should mention that the very first thing I did was make sure the display was working properly with English menus and no corrupted menus. It fired right up today before I took it apart.
I followed pmm's advice, located the NVRAM chip with the help of a user from here whom posted videos on youtube and also has a diagram, and desoldered pin 8 (VCC) from the NVRAM chip.
Now the monitor appears to work fine. So I'm going to check on it throughout the next few days and I'll post back if it messes up again...Last edited by rooket_1000farads; 10-30-2010, 07:15 PM.Leave a comment:
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Re: Samsung Syncmaster 205bw, blink of death
No edit button on this forum?
Well anyway today I turned it on and it gave me the less brightness so I turned it off and turned back on. It displayed everything in German. I've seen this before. The brightness menu came up in all German too. So I did my typical reset on it and then got the main menu up (also in German) and then I held the Enter button down for 5 seconds for factory defaults. It is running right now with no issue but every day if I leave it off over night, it tweaks out. Obviously something going on with...Last edited by rooket_1000farads; 10-17-2010, 10:50 AM.Leave a comment:
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Re: Samsung Syncmaster 205bw, blink of death
now an update. unfortunately, this screen now intermittantly glitches after powered on and the buttons won't always work. I'm not sure what else should be replaced inside. there are other types of capacitors and the controller board has surface mount ones. it is kinda acting like some sort of capacitors are still malfunctioning. I may source a controller board or look into replacing the other types of caps. I'm not sure but it seems like one could remove all the solid caps and replace those, but I am unsure if that's what it needs. right...Leave a comment:
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Re: Dell E2209Wc Display
what does the inverter fuse look like? I saw on my 205bw circuit board "fuse" lettering but I didn't see any fuse nearby it. I replaced all the capacitors but was wondering what would happen if I ended up blowing the fuse one day, but I can't see it....Leave a comment:
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Re: Samsung Syncmaster 205bw, blink of death
I just successfully repaired a 205bw monitor. Thanks for the help guys. I replaced all of the electrolytic capacitors inside it. Here's what I ordered:
quantity: one
493-1583-ND
CAP 470UF 35V ELECT HE RADIAL
SCHED B: 853222
ECCN: EAR99
LEAD: LEAD FREE
ROHS: ROHS COMP
quantity: four
493-1558-ND
CAP 1000UF 25V ELECT HE RADIAL
SCHED B: 853222
ECCN: EAR99
LEAD: LEAD FREE
ROHS: ROHS COMP
quantity: one
P13478-ND...Leave a comment:
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