Re: W241D (W240D) flickering Problem
Replacing the two 100uF/16V SMD capacitors marked by red circles in Leontius' post earlier on this page solved the problem for me, after having gone through some earlier, partly successful (but in retrospect probably futile) steps.
I measured the capacitance and ESR for those caps I removed. One measured at 76uF/7 ohm, the other was 82uF/13 ohm - in other words, they were past due. As I did not have any 100uF capacitors handy I replaced each by two 47uF/25V (axial electrolytic) in parallel. The ESR for the replacements (in parallel) was 0.07 ohm.
I now run the monitor without the fan I built in the back. The hole behind which the fan lived is still there (with a grating in front to protect the inner workings) so passive cooling is improved over the original.
https://www.badcaps.net/forum/attach...1&d=1453656621
The thing has not flickered yet, not even when displaying 10 terminal windows crammed with small-font content. While this would work initially, it soon required the fan to be stable. Lately it jumped around even with the fan at maximum speed. Now, it just works... or should that be 'for now...' - time will tell. There are sure to be other bad capacitors on the board, they just don't have as visible an effect on the workings of the monitor.
For those interested in installing a fan in this monitor, you can get 12V from the power supply, just look at the unpopulated connector for which lines to use.
Originally posted by StealthyMonk
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I measured the capacitance and ESR for those caps I removed. One measured at 76uF/7 ohm, the other was 82uF/13 ohm - in other words, they were past due. As I did not have any 100uF capacitors handy I replaced each by two 47uF/25V (axial electrolytic) in parallel. The ESR for the replacements (in parallel) was 0.07 ohm.
I now run the monitor without the fan I built in the back. The hole behind which the fan lived is still there (with a grating in front to protect the inner workings) so passive cooling is improved over the original.
https://www.badcaps.net/forum/attach...1&d=1453656621
The thing has not flickered yet, not even when displaying 10 terminal windows crammed with small-font content. While this would work initially, it soon required the fan to be stable. Lately it jumped around even with the fan at maximum speed. Now, it just works... or should that be 'for now...' - time will tell. There are sure to be other bad capacitors on the board, they just don't have as visible an effect on the workings of the monitor.
For those interested in installing a fan in this monitor, you can get 12V from the power supply, just look at the unpopulated connector for which lines to use.
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