Samsung 2232BW - Power light

[JoeyJoe]

Just a quick question.

The monitors power light comes on as soon as it is plugged in, but nothing happens if you press it.

I've seen before monitors with bad caps / transformers that when you press the power button, at least the LED turns on and off.

Would this indicate something else is wrong with this monitor?

Joe

[addytzu123]

Re: Samsung 2232BW - Power light

Hi,
There can be a number of faults here, but from the little infos you gave, if the On LED comes straight up when you plug the cord, could indicate a corrupt eeprom software (being a Samsung monitor). However nothing is for sure until you start measuring all the voltages from PS and from the voltage regulators from the main board!

[JoeyJoe]

Re: Samsung 2232BW - Power light

Ah I see.

Who ever had the monitor before me had removed the caps, (I presume to test them), and looks like they couldn't find the problem. There are 2 inverters so I guess they are both fine.

I tried to look for a picture on the screen with a light, but couldn't see anything.

I did suspect the logic board being the problem. I will look though my other monitors to see if I can find a compatible one.

Also is there a guide to which voltages to check?

[JoeyJoe]

Re: Samsung 2232BW - Power light

Checked the 13.5V and it is 14v. I assume this is normal. Is there a way to force the power board to turn on the inverters so I can see if the board is working normally? There is a "ON" pin on the logic connector.

I checked some of the voltages on the logic board, 13.5v is at 13.9v, but the 2x 5v pins on the logic board aren't getting anything.

Update: Bridged a 3.3v from the logic board to the ON pin, and the backlight turns on. You were right addytzu123! Logic board it is!

[addytzu123]

Re: Samsung 2232BW - Power light

First of all see attached link for service manual, see what voltages you should get at the input connector from the PS, and provide clear pictures of your boards, so other users can help you with more targeted advices.

http://elektrotanya.com/samsung_2232.../download.html

Wait a minute, then press "Get manual" link

Cheers

[JoeyJoe]

Re: Samsung 2232BW - Power light

I will get some pictures shortly.

The voltages suggest the PSU is working fine. The logic board, not so much.

[JoeyJoe]

Re: Samsung 2232BW - Power light

Funny enough, just received another exact same monitor in the post. I think this one has a bad PSU, so should be able to get 1 out of the two!

[budm]

Re: Samsung 2232BW - Power light

Look for bad caps:
http://s807.photobucket.com/user/bud...?sort=3&page=1