Re: Samsung T240 input switching issue

The lamps come on only with the logic board connected, i will try with a battery and report back

Re: Samsung T240 input switching issue

Hi Rtech

I did the tests on CN2

15V and 5.2V (which shows 5.3V) are there

But 3.3V is showing 0.3V on CN2 i have checked CN3 as well and the reading for 3.3 is the same

C106 cap reads 2.5V

Also checked the outputs with the logic board connected

the 15V when the monitor is turned on but no lamps connected shows 17.8V
The 5.2V pins show 5.2 normal

3.3V is present

Key 1 and key 2 pins

Key1 shows 3V steady
Key 2 going...

Re: Samsung T240 input switching issue

Ok so i pocked around with the fluke just testing the components and found some diodes that look like they are blown

D103 a small glass diode that is located right next to the 47uF cap,from what i gather its

D103
0403-000258
DIODE-ZENER;BZX84C5V6,5.2-6V,225mW,SOT-2

Another Diode between the heat sink and the 47uF cap also shows over 1.12V with the black probe on the other side from the line.

This one marked ZD101, have no idea what the model is

Also found another one...

Re: Samsung T240 input switching issue

Found a video on youtube that shows the exact same behaviour i have on my T240

[url]http://www.youtube.com/watch?v=r7m5-JSPYF8[/url]

Can it be the transformer? Can anyone tell me how to test the transformer on the AC side?

Since i already replaced the inverter transformer i'm kinda running out of ideas Re: Samsung T240 input switching iss...5-JSPYF8[/url]

Re: Samsung T240 input switching issue

No one has any suggestions?

Hi guys,

I went over the posts regarding this monitor

The issue started about a month ago, when i turn the monitor on it would not display a pictutre but started to go through the inputs (Auto search)
When the correct input is found DVI,i can see a picture but every few seconds the picture goes on and off, and the orange led turns off and then off at the same time, this behavior can go on for some time and then it will cycle through the inputs again.

I have replaced some of the caps since i could not find the other ones at my local electronics...

Re: New Members - please post your introductions here

Hell everyone,

Have a monitor that is behaving funky, googled the issue and stumbled on this great forum.