Re: Acer H243H Bbmid - replacing caps not enough
hello
I disassembled the panel.
and the bottom pair looks like this. I think it is not good.
I have another samsung 19" monitor.
can I try the backlight from this one or must it be another 24" backlight? have the manufactures different voltages or are they all the same and the just get more current?...
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Re: Acer H243H Bbmid - replacing caps not enough
Thanks for the help.
I measured the HV winding on secondary side.
transformer 1: 647 ohm
transformer 2: 658 ohm
transformer 1 is the one which made the noise.
so they should be in the 3% tolerance if I understood it right in the guide thread.
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Re: Acer H243H Bbmid - replacing caps not enough
I have red the tutorial, but I 'm not sure.
Shall i measure like I marked in the photo?
put GND on one pin (black) and measure the others (red)?
how do i set my multi meter 200 ohm or 2k ohm.
thank you...Last edited by mcflash; 07-01-2013, 11:44 AM.
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Acer H243H Bbmid - replacing caps not enough
Hello,
I am from Germany, so I am sorry for my bad english.
I have here a Acer H243H Bbmid.
2 seconds to black. you can see the picture with a flashlight.
I replaced the caps on the supply board. It still doesn't work.
I left it for a few weeks. on a new test it worked with a whisteling tone.
I opened it again and then there was the 2 seconds to black again with that whistling tone. I got near with my ear and could locate the tone on the "red marked" piece.
before the monitor shuts off it is flickering as the...
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Re: New Members - please post your introductions here
hello,
this is my first post
I was reading here for a while.
I repaired a few monitors with bad caps.
3 monitors I could not repair, so I am here to learn more about electronics and fix these 3. And in future I should be able to fix everything, I hope
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