I have a Dell 2005FPW AO3 revision monitor that has started having the familiar power on/off issue after a short period of operation.
The monitor works after cold start for 10-30 minutes, then begins to emit a high pitched squeal. It can continue to operate after the noise begins for roughly an hour. It will then enter a power cycle on and off with the backlight clicking on and off until physically unplugged. During this behavior the power buttons are unresponsive and no image is displayed during its short power on. If you power it off when the noise begins it immediately starts the power cycle when turned back on.
After it rests while unplugged it will work again for 10-30 minutes and the behavior repeats.
One interesting note is that if the two wide connectors, visible in the side - LCD power connectors image, are disconnected the monitor can be powered up immediately after it began its cycle, emits no noise, is properly lit and displays output properly, but turns off after one to two seconds.
All the capacitors appear to be Sam Young 105c, at least the ones I can read. The PCB is unmarred by scorching and the capacitors are not obviously leaking or domed, but there are many covered in white goop.
I have a soldering iron and am confident enough to clip the caps and resolder them, but not sure what capacitor brands/types to replace them with or which ones are stand out culprits.
The monitor works after cold start for 10-30 minutes, then begins to emit a high pitched squeal. It can continue to operate after the noise begins for roughly an hour. It will then enter a power cycle on and off with the backlight clicking on and off until physically unplugged. During this behavior the power buttons are unresponsive and no image is displayed during its short power on. If you power it off when the noise begins it immediately starts the power cycle when turned back on.
After it rests while unplugged it will work again for 10-30 minutes and the behavior repeats.
One interesting note is that if the two wide connectors, visible in the side - LCD power connectors image, are disconnected the monitor can be powered up immediately after it began its cycle, emits no noise, is properly lit and displays output properly, but turns off after one to two seconds.
All the capacitors appear to be Sam Young 105c, at least the ones I can read. The PCB is unmarred by scorching and the capacitors are not obviously leaking or domed, but there are many covered in white goop.
I have a soldering iron and am confident enough to clip the caps and resolder them, but not sure what capacitor brands/types to replace them with or which ones are stand out culprits.
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