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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-21-2014, 08:30 AM
Re: Black screen Samsung syncmaster 203B

Yessss it's perfect ! my screen work !
Thank you, thank you so much man, I appreciated all the things you've done for me.
And when i ordered the fuse, i order capacitors too with the right dimension, so i replaced them all, i should have take a picture, it's clean now

Thanks again, see you...

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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-20-2014, 03:50 AM
Re: Black screen Samsung syncmaster 203B

Thank you for all this pictures very understandable, so here's the results:

test1: overload; 636 (one direction; opposed direction)
test2: overload; 1601
test3: overload; 815
test4: 193; overload
test5: 1154 (not so sure my be overload too, various measures); overload
test6: 783; overload
for the other mosfets i've exactly the same results

test7: 673

test8: 630 (for the both capacitors)

test9: 1ohms may be less (0.8)
test 10: 1350ohms...

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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-18-2014, 04:13 PM
Re: Black screen Samsung syncmaster 203B

I try to check the mofset thanks to your indications and the pdf document but i'm not sure, so yes if it not bother you i would like a picture
thanks !

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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-18-2014, 07:32 AM
Re: Black screen Samsung syncmaster 203B

ok ok, thank you for the pictures, it help me a lot.
All is good then, so do you think that only the fuse F301 ? i will receive it soon anyway, i keep you posted.
Thanks

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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-17-2014, 08:18 AM
Re: Black screen Samsung syncmaster 203B

Can you show me on the pictures of the circuit where exactly i got to check please?
for example, where is "across the c316" ? you know what i'm sayin' ?

and i don't understand all of your sentences like "you should get only the body diode voltage drop when forward biased" i'm sorry but its difficult for me, i know very few things in electronic, and added english it's even more harder

than you for all anyway

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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-16-2014, 04:35 AM
Re: Black screen Samsung syncmaster 203B

I found this [URL="http://archive.espec.ws/files/sem2005.pdf"]http://archive.espec.ws/files/sem2005.pdf[/URL] and this for the mosfet [URL="http://www.aosmd.com/res/data_sheets/AOP610.pdf"]http://www.aosmd.com/res/data_sheets/AOP610.pdf[/URL]

if it can help, and 2 pictures of the inverter part.Re: Black screen Samsung syncmaster 203B

I found this [URL="http://archive.espec.ws/files/sem2005.pdf"]http://archive.espec.ws/files/sem2005.pdf[/URL] and this for the mosfet [URL="http://www.aosmd.com/res/data_sheets/AOP610.pdf"]http://www.aosmd.com/res/data_sheets/AOP610.pdf[/URL]...

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Last edited by mani300; 10-16-2014, 04:50 AM.
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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-15-2014, 05:56 AM
Re: Black screen Samsung syncmaster 203B

i have testing with the continuity test function:
the fuse F301 get a big score and increase until overload
the fuse F101 get a zero or very close to that.

When i measure with the ohm meter the fuses outside the circuit:
F301 => nothing at all
F101 => (range 200 ohms) => 00.5

do you think that the problem will be solve by changing this 2 fuses ?

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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-15-2014, 03:03 AM
Re: Black screen Samsung syncmaster 203B

The new caps have the same specification that the old one, it's just the size is different.

When i turn on the screen, the power led is on (color blue, no flicking) but the screen is black, so the neon (backlighting) doesn't work.

Please how can i check the fuse with a multimeter ?

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mani300 replied to Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-15-2014, 01:45 AM
Re: Black screen Samsung syncmaster 203B

How can i check this fuse ? i have a multimeter but i don't know how use it
yes, i've bought caps in a electronic store who have only this type of caps and no shorter. So i have to twist them...
If the soldering is good, it's ok no ? it looks like crap i know but i doesn't have a choice

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mani300 started a topic Black screen Samsung syncmaster 203B

in Troubleshooting Computer Displays

10-14-2014, 08:19 AM
Black screen Samsung syncmaster 203B

Hi !
I have a little problem with my lcd display since couple of weeks, my screen has become black suddenly, we can see anyway with a flashlight some icons when i push the button menu for example.

I think the problem is the power supply board (i've attached the service manual), i have already change the bad caps but the screen is still black. May be it's the inverter or somehting else, i'm not so good in electronics, i just read a lot of thread like this and watch video, so i will try to be clear with my answers, i'm sorry for my english but i'm a french guy...
...

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Last edited by mani300; 10-14-2014, 08:29 AM.
mani300 replied to New Members - please post your introductions here

in Announcements & Related News

10-13-2014, 09:04 AM
Re: New Members - please post your introductions here

Hi everyone ! i'm just a french guy who doesn't speak english very well, and i'm in trouble with my lcd display.
I find this website after several hours of search and i hope i will find the solution here !
Otherwise i'm 26 years old, i live in south of France (Toulouse) and i work in chemical field.
I practicing lots of sports like Track and field (100m, long jump) and recently Crossfit

Thank you for yours future answers !

See you !

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Black screen Samsung syncmaster 203B

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