I have and x22wg-1080P bought from Costco April 20 2007. In June '08 it started to go black after two seconds on cold power up, flashlight confirmed that LCD was functioning, backlight just went dark. Power LED remained on.
I could get it to remain on if I powered it off with the button, turned it upside down and smacked it on the desktop a few times. It would then stay backlit when I powered it back up. Smacking it around any other way did not work.
So, I set the Windows screen saver to blank the screen, but not power down the monitor after 15 minutes of inactivity. This had the effect of leaving the backlight on but blanking the LCD, so I did not have to go through the monitor smacking exercise for months on end. Suboptimal, I know, but expedient.
This state of affairs went on for years until a couple of weeks ago when the backlight went hard dead after one of our infrequent AC power failures.
I figured it was a cold solder joint. I opened it up and spotted four cone top electolytics on the inverter board, a couple of them had vented.
I replaced all the CapXon 470uf caps with United Chemicon ELXZ250ELL471MJ16S. In my excitement of finding obvious problems, I forgot about my cold solder joint theory and did not heat up the transformer solder joints as I had planned.
The monitor worked fine for one day. The next day, I heard a high pitched whine from the monitor that rose in pitch and then went away as I cranked the brightness up. I thought OK, I can handle a brighter monitor, I have sunglasses if need be. :smile. The day after that the monitor went back to a solid two seconds to black issue.
A couple of questions.
Did I use the right caps?
How can I test the CCFL's without having another CCFL to replace?
I only want to take this thing apart one more time if possible.
Spark
I could get it to remain on if I powered it off with the button, turned it upside down and smacked it on the desktop a few times. It would then stay backlit when I powered it back up. Smacking it around any other way did not work.
So, I set the Windows screen saver to blank the screen, but not power down the monitor after 15 minutes of inactivity. This had the effect of leaving the backlight on but blanking the LCD, so I did not have to go through the monitor smacking exercise for months on end. Suboptimal, I know, but expedient.
This state of affairs went on for years until a couple of weeks ago when the backlight went hard dead after one of our infrequent AC power failures.
I figured it was a cold solder joint. I opened it up and spotted four cone top electolytics on the inverter board, a couple of them had vented.
I replaced all the CapXon 470uf caps with United Chemicon ELXZ250ELL471MJ16S. In my excitement of finding obvious problems, I forgot about my cold solder joint theory and did not heat up the transformer solder joints as I had planned.
The monitor worked fine for one day. The next day, I heard a high pitched whine from the monitor that rose in pitch and then went away as I cranked the brightness up. I thought OK, I can handle a brighter monitor, I have sunglasses if need be. :smile. The day after that the monitor went back to a solid two seconds to black issue.
A couple of questions.
Did I use the right caps?
How can I test the CCFL's without having another CCFL to replace?
I only want to take this thing apart one more time if possible.
Spark
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