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Re: Syncmaster 2253lw inverter "not turning on"
Okay, today I received the caps and multimeter.
Replaced remaining caps and STILL doesn't work. All I get still is the solid blue power light.
However if I tested the fuses correctly using the multimeter one of them is no good.
The "button" fuse I tested its continuity and ohms checks out at "0" - it dropped to that.
The "longer green" fuse (125v F4 0AL) by the inverters has no continuity and the ohm number keeps on going up and up and up.
The diodes are fine for continuity in the one direction as it should.
So am I correct if testing a fuse on ohms if the number keeps on increasing means the that fuse is no good? Please correct me if I'm mistaken, but in my research think I'm correct. If that fuse is bad I hope it's easy to acquire as I never ordered such.
Thanks
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Last edited by retiredcaps; 05-09-2012, 06:27 PM.--- begin sig file ---
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Re: Syncmaster 2253lw inverter "not turning on"
45 cents at digikey.com
http://search.digikey.com/us/en/prod...1018-ND/614953--- begin sig file ---
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Re: Syncmaster 2253lw inverter "not turning on"
Sometimes fuses die due to fatigue. Sometimes not.
Post a clear focused picture of the backside of the power board. Usually there are some mosfets. If they are shorted, they may have taken out of the fuse.
See section on mosfets for how to test
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Re: Syncmaster 2253lw inverter "not turning on"
I know that the photo above is "lousy", but if you see that "long" green fuse by the cap on the right by the inverter in that photo is the one that failed.
Now where to get one - can't find it as maybe I'm searching wrong.
Can you please give me a suggestion?
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Re: Syncmaster 2253lw inverter "not turning on"
Good idea for sure.
Well I have a donor one (that I just realized I had laying around) that I'll use to see what happens from an old power board of a crappy monitor which same rated fuse checks out.
If it works I'll await my next cap order to order these and with me finding things that will be soon.
Just today I repaired a 20" Samsung monitor by replacing all the caps - of course that now works fine and which I won't personally use but the 22" (2253lw) that I want to work for me doesn't - lol!Comment
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Re: Syncmaster 2253lw inverter "not turning on"
I replaced the fuse and now it's totally dead even though the fuse checks out before and after the installation.
Sounds like this monitor doesn't want to work for me.
Time for mosfet check.
EDIT: Okay tested the mosfets and one is shorted - fun fun fun! lol!
What would I do without a multimeter? I know, I would've given up already.Last edited by nickt1862; 05-10-2012, 09:10 AM.Comment
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Re: Syncmaster 2253lw inverter "not turning on"
After back and forth for a couple of weeks the repair of this monitor is dead! I screwed up taking out a mosfet that it took the trace of a leg off the PCB.
I'm so ticked off!
Thanks for the help till this point - I really do appreciate it.Comment
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Re: Syncmaster 2253lw inverter "not turning on"
Post a clear picture of the back. It might be possible to bridge the pins if depending on what you lifted OR you can install a jumper wire to another component.
What is the part number of the mosfet?
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Re: Syncmaster 2253lw inverter "not turning on"
Yeah definitely don't give up on it as its unlikely that it cannot be repaired.
As retiredcaps says we need as nice clear picture.Comment
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Re: Syncmaster 2253lw inverter "not turning on"
Thanks guys, that power supply board is not worth repairing as I found that also out one of the inverters is bad as well = comes out to too much $$ and effort and just makes no sense to me.
Cheaper for me to find a used or new working power board as eBay has some for $2x.xx shipped.Comment
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