I used 3 acer P235H 23" monitors for Eyefinity up until one of them started going out on me. A few times when it turned on it started flickering on one side, but then stopped as it warmed up. Finally it gave up the ghost and wouldnt stop flickering. Here is a video of it: http://www.youtube.com/watch?v=bWpqbBXcQro
I don't have the money to replace all three monitors, so id figure id try fixing it instead. i pulled it apart and listened to it during operation with the power supply out. While it flickers it makes noise so i figured i'd look to the output transformers first. it was flickering more on one side than the other, so i unplugged the transformer that powered that side, and it stopped making the noise. So first i figured this mean that perhaps the transformer had gone bad. I ordered one off ebay and waited a couple weeks till it showed up.
When i first soldered it in, i did a somewhat messy job and soldered all the input leads for each side together. The monitor powered up fine and did not flicker, but the transformer itself made a very high-pitched whine. I cleaned up the solder then re-assembled the monitor to see if having it together would make the sound bearable, but cleaning the solder points caused it to flicker again (which tells me the transformer isn't getting clean power)
Now, I had been consulting with someone who told me to check the Capacitors, which i did. The capacitors directly powering the output transformers are SAMXON 270uf50V. Samxon is listed as a good cap manufacturer, and none of these caps appear to have blown.
However, The main AC Input Capacitor and several of the other capacitors (mainly for the built in speaker circuit) are Su'Scon, which are on the Bad Cap list here on the forum. At this point I am not going to worry about the Speaker circuit caps, i dont need them anyways, but i want to replace the Main Input Cap (150uf 450v) and put the old transformer back in and see what happens.
there is one slight problem with all this. I'm not in the mood for waiting on this anymore, so i want to get a Solid Capacitor from a seller in the US. I want to get a RubyCon replacement capacitor, however, all of RubyCon's offerings use short snap-in leads, and i need something with long bendable leads for a 90deg orientation.
I was thinking i could solder leads into the PCB, then solder them to the legs of the Rubycon capacitor, but i don't know how safe that is, and i wanted to ask you guys what you think.
The reason i have Gateway FHX2300 listed in the title as well is that Acer Bought Gateway in 2007/8. My monitor was made in 2009 and the Gateway FHX2300 shares the same Power supply PCB (ILPI-129)
Here are some pics of the PCB:
Front, as you can see, one of the transformers was removed in this picture. Green caps are Samxon, brown and black are su'scon:
Back of PCB:
Thanks
I don't have the money to replace all three monitors, so id figure id try fixing it instead. i pulled it apart and listened to it during operation with the power supply out. While it flickers it makes noise so i figured i'd look to the output transformers first. it was flickering more on one side than the other, so i unplugged the transformer that powered that side, and it stopped making the noise. So first i figured this mean that perhaps the transformer had gone bad. I ordered one off ebay and waited a couple weeks till it showed up.
When i first soldered it in, i did a somewhat messy job and soldered all the input leads for each side together. The monitor powered up fine and did not flicker, but the transformer itself made a very high-pitched whine. I cleaned up the solder then re-assembled the monitor to see if having it together would make the sound bearable, but cleaning the solder points caused it to flicker again (which tells me the transformer isn't getting clean power)
Now, I had been consulting with someone who told me to check the Capacitors, which i did. The capacitors directly powering the output transformers are SAMXON 270uf50V. Samxon is listed as a good cap manufacturer, and none of these caps appear to have blown.
However, The main AC Input Capacitor and several of the other capacitors (mainly for the built in speaker circuit) are Su'Scon, which are on the Bad Cap list here on the forum. At this point I am not going to worry about the Speaker circuit caps, i dont need them anyways, but i want to replace the Main Input Cap (150uf 450v) and put the old transformer back in and see what happens.
there is one slight problem with all this. I'm not in the mood for waiting on this anymore, so i want to get a Solid Capacitor from a seller in the US. I want to get a RubyCon replacement capacitor, however, all of RubyCon's offerings use short snap-in leads, and i need something with long bendable leads for a 90deg orientation.
I was thinking i could solder leads into the PCB, then solder them to the legs of the Rubycon capacitor, but i don't know how safe that is, and i wanted to ask you guys what you think.
The reason i have Gateway FHX2300 listed in the title as well is that Acer Bought Gateway in 2007/8. My monitor was made in 2009 and the Gateway FHX2300 shares the same Power supply PCB (ILPI-129)
Here are some pics of the PCB:
Front, as you can see, one of the transformers was removed in this picture. Green caps are Samxon, brown and black are su'scon:
Back of PCB:
Thanks
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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